Field Notebook: Texas 1957a

Ross, Charles
1957
Yale Peabody Museum of Natural History
Original Source
Source Material:
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stratigraphy foraminifera biostratigraphy Pennsylvanian Wolfcamp Fm

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doc. 0315 WESTERN WASHINGTON UNIVERSITY 1893 COLLECTIONS MADE BY CHARLES A. ROSS The following collections were used in Charles A. Ross' 1965 Journal of Paleontology article "Late Pennsylvanian Fusulinidae from the Gaptank Formation, West Texas" vol. 39, p. 1151-1176. Section 26, bed 2 (26-2) 30-3 31-3 32-1* 26-8 30-6 31-8 32-11 (2 bags) 26-10B 30-10 31-13 32-12 28-1* 30-19 32-16 (?3 bags) 32-16 (=7-16-57-loc.7 (not 7-17-59-loc.7 & not [6753] (Leonard?)) *Not included in study - probably lacked fusulinids. 34-15 36-4 37-1 35-6 36-6 37-9 (8-20-57; 6683 35-7 36-7 37-9 (float) 35-10 37-11 37-12 6683 The publication locates the collections quite well. These samples were retained by Charles Ross from the main smaples for future reference. They are part of YPM accession [6683] Charles Ross had a note to me that he was still tracking 37-36b which may be from the lower part of the Hess facies. He was also trying to locate the source of samples 8-31-66-J and 8-31-66-O and -Q; probably southeastern Arizona. Bellingham, Washington 98225 (206) 676-3000
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doc 315 Western Washington University 1893 doc 031 20318 COLLECTIONS MADE BY CHARLES A. ROSS The following collections were used in Charles A. Ross' 1965 Journal of Paleontology article "Late Pennsylvanian Fusulinidae from the Gaptank Formation, West Texas" vol. 39, p. 1151-1176. Section 26, bed 2 (26-2) 30-3 31-3 32-1* 26-8 30-6 31-8 32-11 (2 bags) 26-10B 30-10 31-13 32-12 28-1* 30-19 32-16 (?3 bags) 32-16 (=7-16-57-loc.7 (not 7-17-59-loc.7 & not 6753 (Leonard?)) *Not included in study - probably lacked fusulinids. 34-15 36-4 37-1 35-6 36-6 37-9 (8-20-57; 6683 35-7 36-7 37-9 (float) 35-10 37-11 37-12 6683 The publication locates the collections quite well. These samples were retained by Charles Ross from the main smaples for future reference. They are part of YPM accession 6683 Charles Ross had a note to me that he was still tracking 37-36b which may be from the lower part of the Hess facies. He was also trying to locate the source of samples 8-31-66-J and 8-31-66-O and -Q; probably southeastern Arizona. Bellingham, Washington 98225 ☐ (206) 676-3000
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doc.315 C.A. Ross 1957, 1958, Measured Sections and Notebook Pages (accn. 6683) Publ. Sec. # Doc. 315, pages Doc. 316, pages Orig. Field Sec. # Field Map # 1 5 24 2 23 28 3 20 27 4 12 26 5 10 25 6 120 18 7 128 19 8 7, 8, 135, 143 96 20 9 155 21 10 (upper part) 154 42 10 (lower part) 156 43 11 159 44 12 62 35 13 65, 86 36 14 69 38 15 67, 104, 126(not in Pub Sec) 37 16 121 40 17 72 39a, 39b 18 89 41 19 56, 67 7 (VII) 20 40, 45 V 21 49 VI (sec 1/2 way bet. V & IV) 22 29, 38 32 IV 23 23 III 24 19 II 25 16 I 26 71 8a, 8b (skeletal) 27 75 9 28 86 12 29 76 150 10 30 80 11 31 90 13a, 13b 32 101 15a, 15b 33 Udden, 1917, & King, 1931 none 34 97 163 14a, 14b 35 56 33 36 39 29 37 52, 124-127, 169 32 38 43 30 39 48 31 40 107 137, 140 16 41 114 17 42 2 23 43 King, 1931 none none 157 129 22 (not on publ. Map) none 34, 58 34 (not on publ. Map)
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doc. 0315 C. A. Ross Peabody Museum Yale Univ. New Haven, Conn. FIELD NOTES Book I Marathon, Texas, Summer 1957 Study of Wolfcamp Hills and Wolfcamp sediments along front of Glass Mts. - C.O. Dunbar visited me the field on the 22, 23, 24, and 25th of June, 1957 Also Fayette Localities 6683 [ ] = thesis +/- publ. sec. #
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Doc 315 + 316 orig. field doc 315 sec. # 37 38 39 a, b 40 41 42 43 44 I II III IV V VI 7 (VII) 8a, b 9 10 11 12 13 a, b 14 15 a, b 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
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(Neal) Taylor Ranch - Wolfcamp Hills - sunny - warm. 6-22-57 Collection - 6-22-57-1 - upper of P. King bed 2 - point over Geologist Canyon - 200 yds N. of Ukkemites Saddle. 6' 6/22/57/1 4' 20' P. King's bed 2 Collection 6-22-57-2 - from about middle of P. King bed 4 - 100 yds east of east turn of creek Geol Canyon
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(2) Hess as a ls sequence and under lies the Leonard which is siliceous. The Leonard just beneath the sill and top of Wolfcamp is Calcexanites, + often very silly - well lied. The Hess Conglo. is "white" The western end of the wolfcamp looks like a good place to measure the Hess Conglo. and to determine to fusulinid sequence in the Lower Hess (or Leonard) -- Check this section against the Conglo sequence on the north fork of Gool Canyon. Question to think about: what is the nature of the cyclic deposition of the Wolfcamp sequence. The limestones start off with rumble and then go up through clastics which become finer and finally are present as finely laminated sand (Calcareous). These laminae are similar to the individual sets of beach deposits in Lyons Ss. What caused cycles? what conditions changed to cause deposition of Hess Conglo. + Leonard silt + clastic beds. O.O. Dunbar + I drove around east end of Nills and got back side - road not so good. Walked the eastern exposures of the upper Wolfcamp (Piking beds 4 to Hess Conglo.) (3) The fauna needs to be studied from various points along the same bed for the length of exposure. Reef nodules form in great abundance on P.K.'s bed 9 to 12 - this cause uneven, distorted, ls ledges spaced close result of differential compaction.
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Cool in Morning, Sunny, some haze-dusty and hot in afternoon. Regional showers in late afternoon. 6/23/57- Went to Hess Ranch and to spur of ridge around which Road winds- C.O.Dunla explained section to top of Ridge roughly as follows: 100't dolo. 6-23-57H 60' 75' or more Chert+Ispebble Conglo Fossil/ferns 1s (Wolfcamp) "Hess" Conglo The age of the dolo is questionable-The "Hess" Congl--has Wolfcampjuelence over Lying it - so that the conglo is apparently one of the Wolfcamp series. The possible correlation of the above section with that of Leonard Mts needs to be adequately worked out. 6-23-57-1 - Spur ative Hess Ranch House-just east of fault, about 20 feet below "Big Dolo" Edge (about 10' below "rusty" layer). Leonard Mts Section Fault? stump? Conglo Is beds Wolfcamp? Trap tank? Uddemites shale what-happens in the lower part is really a question, beds are miled up, slant horzontal layers and great variation "Wolfcamp" (K2)j 0. 0. Edips. This is loaded with fuselines Leonard? dol < relationship ? E.T. (Then probably from talus slope - not much strat. value) Total Uddemites Shale - east side of goal, canyon 6-23-57-2. 6-23-57-3- west flank of Main Reef node in P.K. Limestone 2 due North by Neal Ranch. wester N 80' 20' well bedded cobbles of massive reef head in limestone, lst+Org Frog P.K. Bed 2 which thin debries - Bryozans between reef Dictyostelium, Aruoid leads to about plate 20'
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(6) Uddenites zone - Brown weathering material in ls - what is it? Section along face of Mid Hills #213 w C Upper Gaptank Is off King Note the great changes in thickness of the Uddenites shale - The contorted bedding of the upper Gaptank Is, the biohermal nodes and variation in thickness of other beds - Trace these out and try to find out if the Uddenites member is only a facies, a true unit, which may have been deposited as the Gaptank was being deformed, time of deformation - what is structure of these? Joints? What about joints about the draped escarpments over the higher biological developments? 8 (part) 6/24/57 Sect. 8 (part) [see p.135 +143] 1st limestone ledge about 20' above top of Worceage Conglomerate in Section Carayur nest at Lenox Hill - ref. C.D. 6527/54 collection 6-24-57-1 is in same horizon as his - 8-12 6-24-57-2- From same section as -1; This is from a large block of ls. 3'x2' in the Hess ledge- The ledge itself isa Sacchinella-Leptodotes reef with mixed boulders of various rock types-unit. This block from which this sample is taken is apparently on edge in the rubble of this reef. 15' Massive reef breccia 5' bedded ls. soundtopo 5' 5' C 6-24-57-3 8-24 gra vuggular Is (Carageonests) dense well bedded Is crumby Is (with some clay) w/ rubble The exact base of the Hess is questionable here - any of these lower 3 contacts would be acceptable.
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(4) 6/24/57-4 8'- 8-24 dark gray, thinbedded shelled '' '' 1'shale 8" ls (like D) 1' /s like D 2nd 1st D a gray ls with fine to mod pebbles, and abundant crinoid stems and shell fragments. The fusulines in -4 are possibly weathered out from lower Larijara and redeposited in pockets in the reef facies. C.D.D. believes there are at least superficially similar to those of collection -3. The contact between the massive clay forming and the underlying could be either a cut surface or an eroded surface-- The way the lower ls units in the siltstone seem in rout would suggest a facies change and not a great unconformity right at the base of the Hess Lodge. (9) Collection 6/24/57-5--at the base of Upper Hess Lodge, 250yds S of gully 1st lead which flows down Carayou section. units 3, Section 8 Collection 6/24/57-6--a forligerous 8-37 horizon in Nex which is 1/2 yd's or less (80') above the basal Hess sacchinella ls. This is interbidded with the siltstone, sandstone (CaCO3) iron-chert stained- Collection 6/24/57-7--slabs of a fusuline + shell chockina--45'+above top of Lower Hess sacchinella ls negat Carayou section.
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Gap tank type area Clear & Sunny 10 loc.1 6/25/57-1 Collection from a limestone within the upper Gaptank Cong of P.King on or close by to the Type section. loc.1 6/25/57-2 - Collection on NE slope at top of P.King Upper Gaptank unit. loc.3 6/25/57-3 - 10' above collection 2 - box 8 just of brownish weathering nodular ls with interbedded yellowish shale - beds above are vandy (brownish-red) loc.4 6/25/57-4 - about 80' above collection 3 In what we believed is P.King's #1 Gaptank ls -- (this maybe his #2 ls below) This is #2! light gray to white ls, with occasional light yellow patches. loc.6 6/25/57-5 - near top of P.King's #3 ls- in one of many gray ls Shell channels? This slope has some loose fragments out which are included in collection loc.6 6/25/57-6 - 10'+15' below base of P.King's #4 Gaptank ls. -- in a brown + gray weathering ls. 11 6/25/57-7 - Collection taken at base of what we believed is P.King's #5 Gaptank ls. - Drove C.O.Dunbar to Monahans to get Santa Fe for Dallas. C.O.D. seemed pretty convinced that the Gaptank is Canyon in age and not River. Suggested that Uddenthal might be Cisco equivalent and he said yes that was what the Jurassic pockets - to. He didn't know whether the #2 ls of King's might not also be Cisco also. The problem of the conglomerate pebbles in collection came up again. This is a good point - Ref. to Australia paper might be good here. C.O. Wants more collections from the upper Gaptank type locality, also a close study of the Wolfcamp and Udendental zone in that region.
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(12) Wolfcamp Hills - east end. 6/26/57- Studied the "Dolomite" sequence at east end of the hills. The easternmost ridge is conglomeratic ls, the dolomite if present is limited to one or two narrow bands. The ls is a more or less typical biotermal deposit; very large amounts of crinoidal debris and fractured shells, a few echinoid spines. Foraminifera are few and are rather coarse even in what appears to be pockets. Collection 6/26/57-1 - is from a smooth weathering lsband about 8" thick within the upper 2' feet of the massive face forming ls. This is over lain by about 2' of unevenly bedded ls and dolomite. The dip of the massives and the unevenly bedded layers is S70E. Much of the slope to the SE of this narrow ridge appears to be rotated and sheared. The bedding planes are off set, Collection 6/26/57/2> 9' 4' 15' 7' 6/26/57/3 This collection (2) is from the 2nd ls highland from the eastern end of the Hills. The pocket from which these foraminifera came is rather thin but of considerable horizontal extent. The stratigraphic interval between 142 appears to be only about 12' above collection 6/26/57-1, but the relationships are obscured by discontinuous bedding and rubble of these 2 biotermal masses. 6/26/57/3 - From the highest portion of the 2nd biozone on the east end of the Wolfcamp Hills. This collection is about 13' to 15' feet stratigraphically higher than (2). 6/26/57-4 west side of 2nd biotermal rey. N 20' 10' S
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(14) 6/26/57/5 - Collection is from uppermost is ledge in what will be tentatively called the Uddentus Member, just west of the 2nd bioluminal high. 6/26/57/5 Brown red even surf brown sh. 6/26/57/6 - This is collection from a furnline horizon in brown-yellow weathering band at the base of the apparent upper Uddentus ls broken (near the middle of the eastern sector in a wind gap.) 6/26/57/7 Collection from Uddentus zone, 100yd's S of western end of dirt entrainment at End Def Wolfcamp Hills. The 5 2/3 biohemg Ring has beds dipping near east at this point and many blocks of this ls have slipped down to cover the contact. This Uddentus bed is high in the zone and as a gray nodular ls with included brown crust weathering sietstones. The calcite in the original rock has been recrystallized, probably as a result of the heat deposition. (15) flexure at this end of the hills, lowering the eastern end. 6/26/57/8 - Collection from brown weathering brachiosped and juvenile cochinea ls, about 25 feet stratigraphically below 6/26/57/7. 6/26/57/7 10' Shale? gray Brown ironstone 2 1/2 ' 15' 6/26/57/8 Shale gray 3' The east of the hills are going to present problems in covered cuturals and erratic discontinuous deposition.
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Section 25 16 6/27/57 Wolf's hills -- This was one hell of a hot day! Measured Section TSa 25 5'156" to water well at Neal (Taylor) Ranch 5'85C" to at tank east of Ranch gap tank 1) Covered below 2) LS, weathering gray to yellow brown, a shell hash of brachiopod and jurulines frags; 5 1/2'; Collection 6/27/57/1 (dep 10) 3) Covered, probably whale actual weathering gray brown, 3' 4) LS, gray to yellow weathering, lower portion(2') 3 to 4" nodular beds, upper portions are nodular beds 2 to 4' thick. Then bands of well bedded brown whale - 17', organic fragments. Top Gap tank Collection 6/27/57/2 5) Covered - 5'; probably whale with a mixture and mudstone layers, no definite bedding could be diverted 6) LS, wet weathering, Crinoid fragments are dominant, some pockets of jurulines are present - 8'. The upper portion of this layer has black LS pebbles in it, but have no fossils. Collection 6/27/57/3 - one black which contained a good juruline fauna -- maybe given lighter in the section. 17 7) Covered, probably whale 5-2' 8) LS, gray, weathering light brown, lower 11' are nubbly becoming better bedded into undulation 3 to 4" layers; clayer 13' massive in 3 to 4" beds, bioherms LS. The shell fragments are occasionally brachiopod and crinoids total 2-4'; Collection 6/27/57/4 9) Covered, 5', probably a weak LS. 10) LS brown weathering, slightly sandy 7', Collection 6/27/57/5 11) LS, gray to brown weathering 5-60' 6/27/57/5 6/27/57/4 numbers? The upper surface of #11 unit has a 1/2" cemented stick on a relatively recent exposed surface. Ref 1 Ref 2 what I believe is probably equivalent to P. King Bed 2.
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18 The formation of Reef 1 precedes that of Rey 2 and the debris from reef one sloped toward the SE. The relations are not completely clear but the debris from Rey 2 appears to rest on the truncated edges of reef one debris, suggesting that Rey one had a great extent to the NE but was removed before Rey 2 came into existence. 1.) Covered 27' probably soft ls. 13.) LS, gray weathering, a bidimensional hash. #210? 17', in 4 to 5 massive beds - 14.) LS, nodular, gray, weathers to white dark 5 to 25' 15) Calcareous, yellow weathering - Caps (14) but intertongues with at NW SE 16) LS. yellow-buff weathering - 20 ft. collection 6/26/57/4 site from this interval - - Top of Ridge - 24 Section 24 Section II about 200 yds SW of section I 1.) Shale, dark brown, bottom of cutwall not seen, top not seen, estimate 100-125' feet thick. Collection 6/27/57/10 [Gaptank shale is considerably thicker here than at type?] 2) LS, dark gray, rubble at base 8', Massive ls ridge 3' (Collection - 6/27/57/7) at 33' above base of 1st ledge - collection 6/27/57/8 this unit becomes progressively more shaley in the upper part. Total thickness of this unit is 44' 3) LS, gray, brownish yellow weathering - indistinct nodular bedding in lower 8' foot of this unit. collection 6/27/57/9 at base - 33' massive ls with one 2' band of modular ls about midway in unit - Total thickness 41' The upper part weathers gray on top. Top of Gaptank - Base of Udden task 4) Covered 12', probably brown shale 5) LS, light gray with interbedded brown siltstone - Orolidal dark. 5' occasional beach frag.
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(20) 6) Covered - 9', probably gray shale and a few brown vitstone bands- 7) LS, brown weathering, bedding 6", uneven surfaces, Cracid, fractured and a few fucolines. Collection 6/27/57/10 24-7 8') 8) Covered - 12' probably line nodulars in a clay or silt, some brown color - 9) LS, gray, massive a) fucolines and brush cocking in a 6" band at base, Collection 6/27/57/11 (same horizon as 6/24/57/6) b) Massive LS ridges 4 to 6' thick. These form the dp slope and seem to be about 10' below what I believe is P. King's LS # 2 bed. 12' thick (?) (21) In the afternoon 6/27/56, I drove NW from the Wolfcamp hills to a tank (about 1.5 miles). From there I walked slight west-northwest to the low outciers of the "Wolfcamp" Series as mapped by P. King, just below his "New Ledge". I found silt and sandstones with even bedding. These are exposed in a gully... They would suggest that the so called "New Lead" at Wolfcamp Hills is only a local bed or lens. The sandstones are med. laminates - 1/8 to 1/16" and have abundant tube (or focal castings) of worms - one I measured was 5" long, 1/4 in diameter and near straight - - About 2' above this silt/sandstone sequence - the rubbly party the LS. I made Collection 6/27/57/12. It looks like what C.O.D. said Schenckully Keigi would look. - 4' above collection 6/27/57/12, I found a brown shale - it had a few streaks of red-brown at the top and some gray in patches - Collect 6/27/57/13 from shale.
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(22) At this time I'm not too sure of the data, but the deal about shifting and cooling reefs maybe a partial answer to the big picture. Perhaps in well logs we could get the needed 3D perspective on the facies shifts. After briefly looking at the lower Nexas, I wonder at what silt, sandstones, and cemented siltstones, with a few interbedded ls. might mean with relation to the cyclic Wolfcamp and the circular and peculiar Uddendites zone. The [illegible] phasing of the bivalve growth in the Wolfcamp must have had other types of deposits elsewhere - could they not be represented in either the Uddendites facies (no because of fossils?) or the lower Nexas (which is not well known faunaally). The Nexas section I saw in the afternoon needs to be restudied in greater detail. The massive cliff former on the Hill is probably all Nexas, but King reports some Wolfcamp and so the face of the hill needs to be studied. Section 23 6/28/57 23 Near Centring WCHs - Section III in line N30W of Taylor (Neal) Ranch 1.) Upper Gaptank ls - same unit as 3 in Section II. Here it is less massive, about 8' feet, with the middle modular zone of unit 3 in Section II thickening up to at least 10', about 12' more is covered and it looks as if the lower massive zone of unit 3 such that it is either missing one modular line. The upper 2 to 3' is a nodular ls, in 6 to 8" layers - becomes sandy Collection 6/28/57/1 covered 23-1 3' Top of Gaptank 8' to about 5' 10' covered 12' 13'
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24 2) 34' covered - probably a gray shale. 3) LS, brown weathering, gray on fresh surface. There is a organic fragment of rock - by brachiopod and a few coral frags. The lower bedding surface, this units contained pockets of Jurinence Collection 6/28/57/2 31" 4) Covered internal - 23' 5) LS, yellow brown weathering, on beds 4' to 8", Crinoidal + jurinlime serlina lines, 50' to the west the unit became massive and compsed only of crinoidal fragments. Collection 6/28/57/3 is from base of this unit. Collects 6/28/57/4 taken 20' above base of this unit. The upper part of this unit became massive and is probably a bioherm. It trails off in both E+W direction into thin beds at the top of the western bioharm and thin beds at the base of the eastern bioharm, 33' 6) Covered - 8" probably gray shale - Thickness to 12" but this depends whether it is between bioherms or at the top of one. 25 7) LS, gray weathering, I take this to be the casey P. Kings # 215 This is a fine grained calacrite at this point. The 2 foot gravelly material below the base of the unit has a jurinlme fauna (Collection 6/28/57/5) 4" thickness of unit - eroded surface - 33' 23' 31' 34'
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Collection 6/28/57/4 from a crown bishermal 1s in the Uddemites zone. This is approximately midway between the base of Pking's #2b and the top of the Gaptank ls. The Uddemites zone is badly eroded here. This section is in line with the road down to the Ranch House S65°E, I estimate the thickness to be 85-95'- The outcrop from which collection 6/28/57/6 is about 8'. afternoon west side of Main Hill The outward appearance of this is quite misleading. The Gaptank ls forms an anticlinal structure under the western bishermal of the main #2 ledge. The Uddemites zone and a part of the bishermal reef have slipped down over the lower Uddemites shale bedding planes. The mass now rests in a structural valley of the gaptank fm. The eastern side has moved the furthest with about 175'/g displacement; the western end is more less hinged about a point. Collection 6/28/57/7 - about 6'-below top of Gaptank fm- east side geologists' Canyon- On the east side of geologists Canyon, the "window" which C.O. pointed out on the first day is most confusing. I have some doubts as to whether it really is a "window" structure. The gaptank does show many folding at this locality and it seems that the Uddemites zone is missing and the #2ls of King rests directly on Gaptank ls.
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(28) The Uddemitter zone of present is only a foot or so thick, but probably is represented by little more than an exceptional bedding plane. The fossils present are dominantly Crinoids and a few Brachiopods and are now oxidized chert or xilica. This area is quite important and it will pay to study the fauna as carefully as possible to determine age relationships. The Dip and questionable faults also may have some importance on the regional structure of the Late Penn. 6/29/57 -- Drove to Alpines and got a haircut and the brakes tightened on the car. Did some Banking for Mrs. Jallis also. Sent 2 bags of rock specimens to Peabody Museum on this date also. Railway Express - COD - 100lbs total 22 6/30/57 Geologist Canyon - Section IV [See p. 38, + p. 32 of Nb 2] Collection 6/30/57/1 -- P. Kings gray ls (# 2 bed) in creek floor Covered below 1) LS, grey weathering 6" to 3' beds, most crinoidal fragments & some other organic fragmental matter. 31' The upper portions of this unit have prominent large boulders in them. Most of the upper 6 to 7 feet is composed of ls cobbles 3" in dia in a ls matrix -- The uppermost foot crosses the large ls cobbles -- The few pebbles found on the upper bedding surface are about 1" in diam. (6/30/57) P is from the lower 3' of this unit.) Collection 6/30/57/2 is from upper 3' of this unit. 2. 8' Covered - probably gray shale Collection 7/1/57/10 3) LS, cobbles. 1/2" to 2" clean cobbles, well rounded with gray chert pebbles -- some crinoid stems, a productidea - Brown weathering Collection 6/30/57/3 4'
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(30) 4) covered 7' black to bluish shale in lower part. 5) LS, single yellow-brown weathering, upper 1/2" sandy and organic fragmental. Flat bedding plane on top. Bryozoa, jawlines, crinoids common on upper surface. Collection 6/30/57/4 3 1/2' 6) Covered, <1/4' one or two 4" to 6" brown weathering sandstones are probably interbedded in a shale (gray?) 7) LS, conglomerate rubble at base grading upward into organic fragmental and finally a sand layer (well laminated) in the uppermost 3 to 4". There is apparently a shale parting between the rubble-conglomerate portion and the organic fragmental-sand portions. Typical fest top bedding plane. (6'?) 6/30/57/7 collection 6/30/57/6 (shale parting) collection 6/30/57/5 covered 8) 2'-2" which the lower 1 1/8" is a rubble of crinoid parts - upper 3" fine grained, laminated sandstone (CaCO3 + much silification) - 9 1" shale parting separates this litho. 9) a) shale gray - grading into crinoid clotching and 1" diam pebbles which forms a rubble - 2 1/2' b) Repetition of 9a 1 1/2' followed by shale parting 1" c) fine calcimine grading upward into a coarse ss, laminated flat upper surface 2'. (31) 9 7+1/57/9 8 6/30/57/4 6/30/57/8
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32 10.) Covered 30' - brown to gray shells probably 11.) Ls, orange brown weathering - another cycle - like units 5 or 7 4' Collector 6/30/57/10 in top portion of unit 11 12.) Covered 13' b) Here a 4" beam scraping around sizes in SS. c) 10' covered 13.) Orange-brown - calcareous - fine grained planar upper surface - no rubble 2nd layers observed. Top of (13) 6/30/57/12 Top finess lamellar 3" reworked shell zone 2"-3" lamellar shelly zone 4"-6" 14.) Covered 7' 15.) Ls, brown-yellow weathering, irregular calcining, but with 1" top zone of fine SS nearly planar. 6" 33 6/30/57/12 6/30/57/11 7/1/57/11 6/30/57/10 7/1/57/9 4" SS (Cal. 6/30/57/14 7/1/57/7 6/30/57/13
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(34) (16) a) 3' gray shale b) 5" brown calcaruti bed c) 1' gray shale A. 2" brown calcaruti bed e) 2' gray shale f) 1 1/2 calcareous sandstone. This is typical top sand and rubble /s - 17) Covered - 25' gray shale? 18) LS, the typical planar surfaced slick calcaruta below - 2' total Collection 6/30/57/15 19) Cover 7' shale? 20) LS w/some chert pebbles - Brown weathering, and not orange yellow as most: A couple (pebble) at base of this is. Collection 6/30/57/16 (6") The fine grained, var d (calcareous) as Collection 6/30/57/17 (4") (35) 6/30/57/18 1/27/67/2 6/30/57/17 7/1/5/7/6 19 6/30/57/16 7/1/57/5 6/30/57/15 18 16 6" to 1' 17 20 21 7/1/5/14 6/30/57/19 22 23 24 21) 17' covered, shale with fine brown laminated inter sandstone - 22) LS, yellow-brown - fairly massive (8') 2' to 3' thick. Some 1" diam. pebbles ( marly black ls. Collection 6/30/57/18 23) Cover - probably gray shale - 8' 24) LS, brown-yellow, one of the cyclic type - cover rubble zone is 3' upper planar zone (5') is 6" Collection 6/30/57/19
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(36) 25.) Covered 16' b) brown ss much like 12b, w/small errnodal debris. c) Shale 12',w/ one 3"brown ss band like 20 (26) LS, & weathering, shale breith- 1/2', sample 6/30/57/20 (27) Shale, covered in part, 3' (28) LS, orange-brown, few fossils 1/2' (29) Shale, yellow to orange w/ a few siltstone layers. - 22' Collection 6/30/57/21 (a+b) 2 sacks Brownweathering ls-sand near base. (30) Covered 11' probably more of 29 shale ±266' (31) Ness Couls. .. Continued, keep 32 (37) 7/1/57/1 6/30/57/21 b q 6/30/57/20 7/1/57/2 7/1/57/3. a c 25 [illegible] covered [illegible] 29
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38 22 7/1/57 - [sep. 29 & p. 32 of Nb2] Took shale samples from section IV 7/1/57/1 to 7/1/57/11 as marked on Section IV 7/1/57/12 in lower 20' of Basal Hess Group. in creek below pool. Canyons - there are dolines and conduits forming in determining source. 7/1/57/13 Sample of Cargle Nees, apple 10' - The Nees Canyon is about 35' to 40' thick here. 39 7/12/57 Mr. Jarvis & his assistant came into field with three Looked over lower west flank of WCHs. " Mr. Jarvis spotted a fault? on northeast side of WCHs better clear it from at Cockeys Top of "C" Udderitz Saddle. N 1' 1/2' 5' King's gray #423 11' 7/12/57/1 33' Udderitz zone 7/12/57/2 27' Covered
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40 20 [Wolf Camp Hills] Section V West end of the WCHs proper - Measured N 200' from outline Below covered but wash - Uddenites zone probably. 1) LS, Conglo. w/ Crenoid + Brach frags., Conglo. cobbles 1" to 4" diam. 16', gray outcrop - top surface is near flat, has an such zone weathered brown. Many of the crenoid items are relatively unbroken and probably have had a great deal of original transport. 2) Covered, 25' - seems to be an interval of gray shale a & brown weathering calcarenite 3) Calcarenite - Brown weathering, lower surfaces appear to be disintegrated. Its upper surfaces are fairly cemented - 4" to 6" beds of SS. with interbedded silts + clays. 5' 4) Shale, blue-gray in part covered 12' 5) LS, similar to # 1 below, pebbles are ½" in diameter however; near top is a good fusulin zone - This horizon divides vertically to the west with upper part forming Kings lid "4" 16' 7/3/57/1 6) Covered, 163' - How many beds are covered here is only guesswork - The value of this interval is of comparative properties only. 7) LS, massive gray weathering, a shell hash which shows very little transportation. Coral, (long slender tetra corals), Bryozoa, isolated fusulinids, brachiopods, crenoid items. lower 18'massive - upper 5' in 6" to 1" beds. 7/3/57/3 total 23' 8) Covered, 21' - shale? 9) LS, blocky-yellow brown weathering, 6" to 1" beds, 2½ to 3'? - Can't see any shell hash. top is planar, but lacks crenellus upper 203'. Shell hash.
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42 7/3/57/15 7/3/57/14 7/3/57/13 10) Covered 2' 11) LS, same as (9), 12) a) shale? 6" to 1' b) rubbly, craggy(½" to 1" pebbles) organic frag. LS. 2' (silicified fossils common) c) LS, coarse size organic frag. even top eroding surface 2'. The beds above (12) form irregular steps on the dip slope to the NNW. Biohermal deposits cause the irregularity in the 6" to 2' ft. beds - 15' to 20' of strata on the dip slope of this ridge which sits above bed(12), and is not covered by alluvium. 43 Fault strikes N15W - 25' strat displacement and apparently downd. This fault is 100yd's east of section 5. This afternoon I tried to trace bed 11, section III around to section I. Bed 11 as eroded away about in line with place where the lower part of section gets mixed up at the first turn on Geol Canyon. The upper anywhere of bed 11 is nearly completely covered out from lines - The next lower is cochino in sect. II, bed 9, I don't believe has this great population found. After losing bed 11, I drop down to what I believe is bed 9, at least the stratigraphic interval is about right - then to bed 8? - back to 9? then a biohermal LS, then a craggy/LS, finally to a LS with a reasonable number of fossils..."? about 300 yds from where I first lost 11. Of this bed is "11" of section IV then it is about 15' to 20'-higher with 2 additional LS inbetween, perhaps several more (ie, a chert separating 2 iron nuggy zones, capped by a LS.) 13) Covered 4' 14) LS, brown/yellow weathering, silicified fuselines + gastropods, some calinoid? spines
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2/14 This unit (14) is what I believe is equivalent in petrologic connection to bed 11, section IV. 20 7/3/57 Morning went to Alpine to see about some photographs; SCS didn't have very good ones, so sent for U.S.G.S. photos - -Sampled from Section V- 7/3/57/8 - a rock sample from about 100 yds. east of section V, from the third unit: at this point unit 3 is dipping 26° S45W. It is truncated by unit 5 which is dipping about 10° N45W, 7/3/57/9 - from Uddintus zone next side of Geologist Canyon, loose specimens - believe the granitites are fairly high, porphyroblasts also- 7/3/57/10 - From top of #2's outlier - on dip slope- 7/3/57/11 - From top of a ls in Geol. Canyon. The question is if this is a Capitan ls then it would appear the #2 gran member King is not present such as much more than rubble at the base of his
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The view on the rather flat top of the Gray is outlier lining up pretty well with the reedy beds across the Canyon. If there is faulting in the upper portion Geologist's Creek it can't be very great. I personally believe a discordance can be explained as slippage on the whole (clastic) zone carrying the gray W. side down. This view is to be the result of a syncline in the upper Gaptank beds which in turn and the cave up 26 apparently control the placement of streams. The Gray is many meters thin to the west or the crust may change lithology and add strata. Between 2 is holzone, paleo will be need to check this. If the #1 bed g section 1 is gaptank and the silty sand would fit nicely as the Udderhol zone. It would seem from the top of the Gray's outlier that bed 4 maintains as part constant interval with bed 5 & section 5, I would put that at about 10' to 12' or just about the displacement of the Little N.S fault. If the fault up Geologist Canyon is for real, the collection from 7/2/57/11 should be Gaptank; I suspect however it will be found to be Wolfcamp. If it is Gaptank then can be easily explained as a bed truncated by the reedy beds of the #2 gray 1's above and then by the #4 bed g key near the creek bed. At this time it seems significant that the large central part of reeds are contemporaneous and are now on the top of a Gaptank anticline. The Udderhol zone under the outlier suggests it too could be a -anticlinal or at least a high area. The fossils I found today in the Udderhol zone indicate near shore depositor. The wood in all probably is too common to have been carried very far to sea, the pelecypods are small but a good Camerin type judging by the elongate spiral end of the internal casts. This gonties may suggest normal marine salinity but this point will require further checking. The question of structural warping of the ls in the outlying keys Gray's
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umber, I believe was an alluvium. I think that there were two reef heads which filled the area between them by debris from central beds. The nearly flat upper surface with 2 or 3 foot or more beds extending many the whole length of the section would further suggest this. The collection of specimens (7/5/57/10) I believe indicate slightly less turbid water (deeper?) giving these smaller smaller shell frags a chance to accumulate in well folded strata. Pictures 4 & 5 of the area of the smaller gap tank and also of the slumped #2 gaps. Pictures 6 & 7 are of the lower part of the section we found in the fields project. July 4, 1957 - Monday ... Marathon! 21 7/5/57 Sect. 21 Section VI - about halfway between section IV & V. 1) LS, gray, massive in 3 to 5' beds, conglomeratic on the upper surface, but only slightly. Base of unit not observed. 2) Covered 6' - stream bed. 3) LS, yellow-brown weathering, organic frag (crinoid, furculinae), muddy quartz sand on upper surface, well rounded, but not frosted, 2', upper surf as flat. 7/5/57/1 4) Covered 16' - probably a shale cutival with at least one perhaps one nodular ls rubble beds. 5) LS, yellow-brown weathering, gray frag, organic frag (furculinae, crinoid), replace quartz in geodes, quartz sand upper surface. The quartz sand seems to have been washed across the ls and some quartz stuck to the ls surface - furculinae are bedded in this 5s layer. 1'
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6) Covered 3', probably gray shale & ls rubble 7) LS, brown-gray fresh surface, orange-brown weathering. shell hash of crinoids, fusulines, bryozoans. progressively finer grained near top. Upper surface is flat 1' 7/5/57/2 8) Shale, bk to blue, slightly silty, has slight putrid odor. 35', brown and variegated silt zones 1' ocasionally - (Calacuite?) 9) Covered, 53' 10) LS, yellow-brown weathering, (gray fresh) organic frag. (crinoid) - don't sure this unit is not slumped down from above. 3' 11) Covered, probably shale in great part. alot of ls rubble in upper part - 37' 12) Calcauite, brown-yellow weathering; some sand (quartz) and upper surface loaded up/ fusulines, but seem restricted to upper 1" 2 1/2' 13) LS, rubble for most part, pretty badly covered and it's possible that there are several shale intervals. 26' 14) LS, a) Calcauite, brown-yellow weathering; med sand size thryng out 2 1/2 to 3 1/2 ' flat top b) shale parting 2" to 3", gray shale c) LS, sangle at base grading up to coarser sand sizes, organic frag. crinoids brachiopods, corals, bryozoans, 5 1/2'
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53 (7/9/57/3) 7/5/57/14 7/5/57/16 7/5/57/13 7/5/57/12 7/5/57/11 7/5/57/9 7/5/57/10 7/5/57/8 7/5/57/7 7/5/57/6 9/27/57/3 (53) 15.) Biohermal mudstone - covers four inches maybe shaley and then rubbly ls., great part is ls. gray, (weathering - yellow buff). corals, brachiopods, sponges (?), juruines 10' 16.) Covered 14' on dip slope of 15 + 14 17.) LS, fine pebble conglomerate, organic frags. of which juruines seem to dominate, Bryozoa 3', finer grained near top, flat upper surface. 18.) a) covered 4', probably gray shale b) 4" brown weathering calcareous sand (quartz) c) gray shale 6' d) 2" orange-brown gritty calcareite e) 6' gray shale f) 3" b.d. like b. g) covered 7', gray shale probably. 19.) LS, orange-brown weathering conglomerate in part, pebble to coarse sand in top 6", more yellow and rubbly near bottom 3' Organic fragmentals: Quartz sand on upper flat surface, scattered juruines also.
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(54) 20) Covered 10' (shale probably) 21) 4" brown (orangish) calcareous w/quartz to 8" 22) 5' Covered (shale probably) 23) LS, calcareous, fine, progressively to top. The upper 5" are well laminated, flat top, 24) a) Shale grayish-brown 3' b) 1" cross-laminated calcareous siltstone-- well laminated, very fine quartz sand also 25) a) Shale, gray 5' b) 4" calcareous--some quartz very fine to fine grained 26) a) Shale, gray 4 1/2' b) 6" Lake (25b) 27) Covered - 30' probably shale and at least 2 calcareous beds (55) 28) Calcareous, rubby in lower 1 1/2' feet, organic frag.; become progressively better laminated in upper 6"; flat top surface. 2', some quartz & fine sand w/gray on top surface. 29) Covered 41', several calcareous with gray shale probably 30) Calcareous, organic frag. (brachiopods, crinoids) 10" flat surface is not striking on this side; wood fragments Collection 7/5/57/16 31) Covered 18' - probably gray shale- 32) Marl, silt & clay in matrix and as coarse sand fractions. Has a well laminated upper 2" with flat top. Sort of transition between influence of source vs environment of deposition. 2' Collection 7/5/57/17 33) Covered 31' 34) "Hess" Crag, 30' +
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59 19 Section 19 [see p.67] 7/6/57 [VIII] Section 1 - low hills to west of Wolfinghill. The line of section runs due north. Covered below 1) Calcareute, pebbles 1 1/2" to 2" max, Calcaren sand matrix + Calc care cement. Fossilizing (Crinoids + Foraminifers), bedding 1' to 1 1/2' feet. Flat top 4 1/2' gray fresh, light yellow brown weathering 2) Covered 5 1/2' probably shale or weakly cemented rubble 3) Calcarenite, w/a few small pebbles, foraminifer big up as crinoids common. Quartz sands in up part, 18", flat top. yellow and brown weathering 4) Covered 17', probably shale + 1 or 2 calcareunit calc (less than 4 to 6" thick). 5) Calcarenite, brown weathering, some quartz sand 8" thick 59 7/6/57/3 7/6/57/2 7/6/57/1 100m 6) Calcarenite, gray-brown weathering, shell laths, foraminifer, crinoids, + traces. Inner part of unit is a whole which grades into a ls rubble, then into a well sorted frag. ls. Upper surface is planed flat. Total 5' 7) Covered 8' - gray shale + some salty calcareunit 8) Calcarenite, well graded mud sand, a few foraminifers (laminas) and ulen joints of crinoids - several beds in a 4' interval 9) Covered 16'. The lower 20 feet is probably mostly blue-gray shale. The upper 15' probably mostly ls rubble.
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58 10) Color white, 2" diam pebbles, some cresoids & hygroscopic, a few jaw lines, brown weathering, gray on fresh surface. 4' 11) a) shale break - 1' b) 7 to 6" well cemented Calcareous, laminated upper 2", flat upper surface. total 1 1/2' 12) Covered 24'--probably shale (gray)--for more brown calcareous may be present. 13) Calcareous, brown weathering, lower part a shelly hardy, a shale break and then the well cemented 4" to 8" calcareous laminated dust total for unit, 4 1/2' 14) Calcareous, (ls rubble) [the main difference between the so called "rubble" and what I've been calling ls conglomerate seems to be the cementing material. In the "rubble" the cement is clay & weathers to a yellow or yellow brown] gray & mottled brown weathering. 18' in 6" to 18" beds. 59 7/6/57/4 7/6/57/5 15) Calcareous, brown weathering, frags in lower part fine pebbles to coarse sand sizes, progressively finer toward top--and sand sizes at top. no apparent laminations. 3 1/2' 16) same as @7, 5 1/2' 17) 3" shale break 1 1/2' of calcareous like @5 18) like @4, 4' 19) like @10, 1 1/2' but pebbles 1" to 1/2" diam
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60 20) Mostly covered, 7', at least 3-4" brown weathering Calcareous, the rest is probably gray shale. 21) Like (19), the upper 1/2' as well laminated, has some ble chert in seams 11 to bedding 1 1/2' 22) Calcareous and gray shale - 3-6" to 1' calcareous brown weathering. Recordal + few large fragments. 4 gray shales, 1' to 1 1/2' total 11' 23) Ls., gray weathering, bedded very. 17' upper part is crudely bedded in 2' units lower part is rubble. 24) a) 2 1/2' gray shale b) 1/2' calcareous, brown weathering (like (15)) 25.) like (24) a) 1 1/2' b) 1' 26.) like (24) a) 6" b) 6" to 2" trace to east 61 7/6/57/6 27) as (24) a) 1 1/2' b) 8" to 4" 28) Calcareous - lower 1' rubble as (14), but 2' as (15). 29) as (24) a) 1 1/2' b) 2 1/2 30.) as (24) a) 4' b) 6" 31.) as (24) a) 2' b) 2 1/2'
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62 32.) Shale gray, 5 1/2', 2 calcareous bands, 2" to 4" thick, fine grained 33.) as (35) 2 1/2' 34.) a) shale, gray 4" to 8" b) grayls, sheet tsecia calcarneate 6" to 1' 35.) 6 1/2' - like (17) lower 5', like (3) upper 1 1/2' 36.) Shale gray, mostly covered [4'] 37.) Calcareous orange brown upper surface, flat 1' 38.) Mostly covered, & 4" calcareous beds at 4' and 10' are exposed 32' 39.) Calcareous "rubble" blocky grayls 6" dean brown mottled zones with cement & furnicing, in them. Beds 1 to 3', occasional evidence of the beds being well sorted and cemented at top 2 observations 63 of this feature. 27' 7/6/57/18 7/6/57/92 40.) Covered 11' probably less resistant to rubble. 41.) like (39) 26' The calcareous making the top bed in this sequence is well sorted and bedded, well cemented, flat top. 42.) Covered 20' 43.) Calcareous, well cemented, yellow-brown, 1 1/2" dean pebbles, becoming fine grained in upper 5" flat upper surface. 3 1/2' 44.) 16', lenticular calcarneites; there are interbedded with shales 50 yds to west I could find any 3 or relatively thin beds.
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(64) 45.) Covered, 64' 46.) gray shales - now interbedded orange+brown sandy siltstones. 53' covered to a large extent - 47.) "New Congr. 8', Calcarudite with a large number of dark chert + quartzite pebbles 1" to 5" diam. (65) Collection 1/6/57/12 from a yellow weathering congl, about 6' below bed 47 - it seems to differ from bed 47 in yellow color and that's about all. 2-3' 7/6/57/12 { 46 7/6/57/10 -> 47 45) The zone of biohermal 15, # 23, seems to carry through pretty well. I believe that # 23, section III, is equivalent to "15, section II, and to # 7, section I.
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66 7/17/57 Big Bend Park. The first collection is from same locality as is the John Wilson Science Department exhibit just by the reaching park HQs 7/17/57/1 103y feet above the upper K contact). 7/17/57/2 along Williams Ck, Tehuacana Quad. N 13', W. 32' Blue regularly Sulfur. [illegible] [illegible] 67 19 Sect. 19 end. 7/19/57 4/8/57 [see p. 56] Wolcamp Kills - Continuation of Section III. 48.) Shales, very silty, grades into a 6" sandy siltstone. Light yellow-brown weathering 3' 49) Conglo., fine sandy matrix, poorly cemented, 1/2" diameter pebbles - a few 2 to 4" bands of greenish gray siltstones. 6' Collection 7/19/57/2 50) Conglo., 3"-4" cobbles at base of a subunit. The subunits grade into a ledge forming (indicated) fine sandstone. 3 or 4 such subunits observed. Top of each subunit is rather planar, Coarsest Conglo. rest right on top of these planar surfaces. 14' 51) Shale and Siltstone, gray to yellow-brown, 5' 52) Sandstone, yellow-gray weathering, in 4" to 10" beds with 2" silt partings. 16'
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68 53) like #50, 1/2" to 1" pebbles, 5' This grades laterally into 6' of gray + yellow- shale + siltstone. Collection 7/9/57/1 54) Sandstone and Conglo. 3" to 3' Lenticular Leds. Conglo. 2" diam mat. sand in mostly Calcareite, 10' 55) Covered 6' - mostly gray to greenish gray siltstone. 56) A multicycle(?) unit like #50, 3" cobbles 1' to 1 1/2' per subunit. 9', calcareite sandstones are very fine to fine size. 57) Sandstone - very silty, + very fine sand eyes greenish yellow brown weathering, 3' rude ledge 1/2" to 1" pebbles 4 1/2' 58) Calcareite & Calcarenite - 4" to 6" silt parting 2 1/2 gray to slightly yellow gray weathering. 59) 57' covered. 69
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70 60) metamorphosed ls, and some baked shale 5' 61) Rhyolite tuff Top of Section cut K. S. 24? collection" 7/9/57/3- from ant Hill on smaller WC knoll, in about horizg #25 or #26 of section VII. Collection 7/9/57/4 - dull gray ls in slope of #2 (gray ls) K. King Outlier - SE flank. 1/3 way up from gate - I doubt if it is in place 20' 45' 25' 60' 7/9/57/4 45' 31? 10' 7/9/57/5 yellow Calamite, dull dark gray ls rubble, rusty 26 Section 26 (Taylor) Section 8a 2 1/2 miles NE of Neal Ranch House Lower part of section badly eroded. 1) Sandstone, fine grained, yellow weathering. Echinoderms, brachiopods, sponges?, fusulinids? This ls is fairly porous and most fossils are empty molds. 1' to 2' 2) Covered 12' 3) LS, gray, shell hash, crinoids, fusulids 9', collection 7/9/57/6, 4" to 1' bedding. At top of unit a bed like #1 is capping. 4) Covered. 29' 5) LS, gray at bottom (2'), 7/9/57/7 42' above are gray-brown weathering dolostone no fossils identified, 2" to 4" beds. 6) Covered 14' 7) Dolostone, yellow brown weathering. 1" to 3" beds 12'
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72 Section 8a runs up a small slope. The various angles of bedding and covered intervals between these outcrops are suggestive of some structural disturbance. Section 8b began on what I believe is Bed 7 of 8a 8) 69' covered. 9) Sandstone, poorly indurated, v. fine sand size, some silt, well sorted however. CaCO3 as common as sand grains - greenish gray & yellow. 36' 1"-3" beds. 10) LS., nodular uneven bedding, 3" to 6" beds Collection 7/9/57/10 3' above line 38' (See page 21) Collection 7/9/57/11 15' above line. 11) Siltstone, pebbly, yellow weathering, same sand as on more pebble than silt! 15' poorly cemented 12) Siltstone with pebbles - Silicious cement 2' 73 Section 26 13) Shale and siltstone (10') green gray colours, 2 6" welded siltstones (silicious) area fog. 14) Sandstone, very fine to fine grained, silicious cement 2' 15) Shale 9' green-gray "bumpy", mostly covered 16) Siltstone w/ Silicious cement, 6" to 2' beds - 2" to 6" shale or silt partings. buff coloured. 11' 17) Shale (some siltstone), fine beds 6" to 1', silicious siltstone, in 4" layers 10' Collection 7/9/57/12 18) Covered 26' 19) Siltstone, silicious buff - [2'] 20) LS, yellow weathering 3' - brown siltstone where there were once fossils - very silty 21) Covered 16'
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74 22) Sandstone, pinkish brown, weak bedding laminated - Calcareous 6" 23) Covered 30' 24) Silty, Brown-orange weathering, dolostone. 4" It was jaruliferous. 25) Covered [25'] above that Coarse Calcarenite 40' or more - 27 Sect 27 7/10/57 C. Brooks Ranch SW exposure, also over the fence on to part of the Neal Ranch. The is cliffs on the NE. part of the Neal Ranch are lithologically continuous with the interval #3 through #7; Section 8a. The #9 unit thickness thins but seems to be fairly continues throughout. Section 9 (dip 7°-10°) (N) sect. 27 7/10/57/1 4' covered gray 6' algals bioherm 24' gray 7/10/57/2 covered 23' v.f. sandstone w/silt 6" greenish gray biohermal + shell hash, gray 18' some brown-red beds 7/10/57/3 15' gray ls - very dark brown 7/10/57/4- 30' several yellow-brown weathering ledges would like to call this loddinite. zone based on color & clastics gray sandstones 75
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76 29 Sect. 29 [see p. 150 of Nb 2] Section 10 (dip 10°) (N) Covered below - float looks like bed #2 section I 1) LS, organic fragmental, crinoids - brachiopods weather light gray with tinges yellow 2 rubble zones near base - a) 14' massive b) 3' in 1' beds (gray c) 5' gray & yellow marries Top Gap tank. 2) Covered 7' some gray shale, probably all! 3) Sandstone, very calcareous (grains) Fe₂O₃H₂O acting as cement? weathers deep yellow brown. 3' There are surfaces coated with crinoid frags. 4) Shale gray with few gray siltstones w/ f. sandstone grading upward into dominant silt found over the shale - unit is essentially gray weathering throughout, becoming slightly yellow near top. 137' 5) Sandstone fine grain, yellow orange weathering 3" to 8" beds, even bedding, nearly uniform size & color throughout unit. total 53' Upper 3' are in 1' beds, paler colors than below. 6) 15' covered 7/10/57/5 7/10/57/6 22' (1) (4) (5) (6) (7) (8) (9) (10) (11)
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78 7) LS, gray, rather fine shell hash. mostly fractured fragments recognizable 81 8) 14' covered 9) LS, gray massive, shell hard, 2 beds 6' sparated by 6" of LS rubble. 12 1/2' 10) Covered except - mostly a less resistant nodular limestone gray brown weathering blackized hard. 23' 11) LS, gray massive bedded 28' (blocked) 12) Covered 5' 13) LS, gray, rubbly at base 2 1/2' fin shell- 14) covered- 4' 7/10/57/7 79 15) Calcareite, cobbles 4" to 6" diam (largest); light brown weathering is matrix. This looks like the "New Eagle" in the Wolfcamp Hills 15' plus (eroded upper bed) Colored Picture 24 or 25 - of a "typical" (?) cyclic sequence of wolfcamp. 1) gray-yellow shale 2' to 3 1/2' collective -> 2) redly and fully fossiliferous] 7/10/57/1 3) LS rubble 1' 4) Calcarenite 8" { orange-brown weathering 5) " 2'} This is probably not typical of the wolfcamp hills, but seems typical of eastern exposures on Brooks Ranch.
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30 Sect 30 Section 11 - began at top of Goat Tank ls. (4up 70N) 1) LS, (Goat Tank) dark gray weathering, 8' massive, upper part contained 1/4" to 1/2" gravels calcancite only in upper part. 2) Covered 11' 3) LS, shell hash, but not readily identified. 1' Collection 7/10/57/9 petid black or fresh sugary, weather dark gray with spots of orange stain. 4) Sandstone, very limy, light yellow to orange weathering, 6" to 1' beds, 34' 5) Covered, probably gray shale. 27' 6) Calcancite, gray weathering, fine sand grains and quite a bit of silicious silt layers. 1" to 6" beds, irregular bedding 15' 7/10/57/10 7) LS, blue-gray weathering, massive bioterminal, buck fags but very fine grained. 4' 8) LS, light gray to light brown or tan weathering. beds 2" to 6", uneven or rumbley, some grained for most part. (no large gravels) several intervals are covered, but seems to be less resistant is rubble. 23' 9) Covered 17' 10) LS, blue gray, sort of a mubble, but almost calcancite. Darker "pebbles" are in a lighter matrix, but the difference seems to be one is reticulate around the other, not good pebbles. 22' 1" to 8" beds 7/10/57/11
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82 7/10/57/13 19 7/10/57/12 17 Collection 7/10/57/11 20 21 22 83 Between unit 12+13 sliver side surfaces were seen cutting the down dip exposed bed 12, no major displacement has taken place, but this seem rather to be the adjustment to a slight fault axis warping forming a gentle syncline near the tank. 9 10 11 7/10/57/8 13 14) Calcarenite, yellow to orange brown weathering quite quartz rich and might be best considered as a quartz sandstone, 2 1/2' 11) LS, light gray weathering, massive, fine grained, 11' 15) Cycle- a) 4" gray shell b) 1" like #4 below (at top) 12) LS, shell hash, walled in mottled gray brown concretions, byzoans, a few brucks, 1/4" to 6" beds., a few inches of shale at the base of this unit. Top of unit has brown weathering color characteris- tic of the middle upper Dolgery cycles. 15' 13) Shales in lower part (5'+2'), becoming more sandy and sandy, quartz rich sandstone in upper 2'+3', 1" shell hash collection 7/10/57/8 see note on picture p. 99 18' 16) Gray shale 9' 17) Sandstone yellow weathering, 1' beds or less; 16'; the fine sandstones have a great deal up to 40-50% fuscinules, crinoide, gastropods, 7/10/57/12 18) Covered, probably continuation of 17 [15']? 19) LS, weather gray to brownish gray, shell hash, brucks, some fusculines. [12']? 7/10/57/13
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20) like #19 '7' 21) Sandstone, v.f. high CaCO3 4' greenish-yellow 22) like #19, 21'; changes to dolomite along outcrop. (600') Although no Conglomerate beds were found, I believe beds 19-22 are in the same interval as the
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86 28 Sect.28 7/11/57/ Section 12; at head of drawm N.W.y section 10 covered below. 1) LS, gray, massive beds, 3 to 20' bedding, bichemal, rather fine fragments - 5' 2) Covered 7' 3) Ls, gray, uneven bedding near base, more massive higher, gray weathering Conchidites + foraminifera near base. 3' 7/11/57/1 4) 1' Covered 5) Calcareous, yellow-brown weathering, brown gray on fresh surfaces. some jurulines and beach shell fragments - 7/11/1/2 6) Covered 2' 7) Calcareous, yellow-brown weathering. some mottled grays, corals, crinids, + brachiopod fragments. [1'] 8) Covered, gray brown shale jockly. 1 1/2' 87 13 7/11/57/2 7/11/57/1 Section 12 9) Sandstone, fine grained, yellow to braw. brown weathering, 6" (calcareous-quartz) 10) Shale gray, mostly covered 2' 11) Sandstone, fine grained, orange brown weathering, calcareous-quartz 8" to 1'
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58 12) Shale, brown to gray with 1" to 3" beds of silexstone & sandstone (fine) poorly indicated. 22' 13) Covered 23' 14) Sandstone, brown to yellow weathering in 3" to 6" beds, gray on fresh surfaces. Calcareous cement & some calcite glasses <30 to 40%. Crossbedding ½" to 1" fine text sand well sorted; I believe this to be either ocean or beach, maybe a setting both. 27' 7/11/57/3 15) Covered 18', as rubble? 16) Dolostones, 45'+ brown weathering. Above are undoubted New beds of general paleont & petrology as 19 through 21 of Section 5B. Section 12 (cont.) 7/11/57/3 69 16 15 14 13 12 w E path 16 19 red. 75' to 80' Reallly need to work this out on photos! [illegible]
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90 31 Sect 31 Section 13a - 1/4 E of Suctm. 11 up front of Lowridge - 7/11/57/2 To top of hill 4752 Suct. 27 of King 11) LS, dark gray, (Caplank) Looks like broken rubble - 3 to 4" diam blocks 5 1/2' Massive 7/11/57/4 12) LS, rubble, dark gray, in 3" beds very uneven, 1 1/2' 13) LS, like 1, upper 3' or 8" to 1' beds, lower 9' massive, weatheres to irregularly pocked, but rather smooth massive. 7/11/57/5 14) Sandstone, fine grained weatheres orange to yellow brown, some green column patches, 3" to 6" beds; 3 1/2' 15) Covered, but seems to be a dark red brown shale zone - This is same color as is at top of Wolf range 3/4 mile Wt. 7/11/57/6 9' 16) Calcandite - all sizes, up to about 2" diam Small peccy [illegible] chert and alter cherts subangular to subrounds. Upper 1' organic fig 9' Lenox Hills 7/11/57/7 Suctm. 13a 7) Maxly Covered, LS, rubble, purples, gray, yellow brown - 5" to 8" beds 28' 7/11/57/7 18) Calcandite; cobbles 6" to 10" diam.; mostly LS cobbles, but a few large chert cobbles + quartz also. On 3' to 6' beds - cementing is weather yellow brown. 45' to top of ridge 7/11/57/6 911 17 12 13 1 6 5 18 11 7 16
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92 Collection 7/11/57/8 from the zone of #8 + #9 units in section 11. The LS have changed to Calcudites and much thinner. They seem to thin rather than being entirely truncated at Section 13. This collection is from a saddle on the N.W. side of the Ridge Section 13 is one. Collection 7/11/57/9 From Gaptank 1s, dark gray (uppermost Gaptank 1s) 2 bags, one softer calcide, one of dark LS. The stream gully on Brooks Ranch 1 mile west of Ranch House. Remark - It certainly isn't like P. King mapped it. 31 7/12/57 Sect. 31 Section 13b - Below unit 1 of section 13, there is an exposure of gray-brown shalw and orange sandstones. Whether this is a zone in the gaptank or the Illinoic Calcudites zone is the major concern. The field evidence (odate) would suggest to me it is a zone in the gaptank - (from a vertical distance, dip 10° to the N.) 1) LS, dark gray, organic fragmental, mostly brachiopods and crinoids - 25' 2) Covered 20' 3) LS, yellow weathering, dark gray fresh surface, organic fragmental - see collection 7/12/57/2 1' 4) Covered 12' 5) LS, black to dark gray, organic dark 1 1/2 ' 6) Covered 28' probably mostly of LS lith.
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Sandstone 7) Calcareous, light orange brown weathering, much quartz; cross bedding, size not well sorted, probably gluvial deposition this unit appears to be truncated at the next by unit #8. 21'; in 6" to 3' beds 8) LS, dark gray, organic fragmental very uneven lower bedding plane, 3' to 5' of relief cut into truncated edges of #7 11' 9) Alternations of Calcareous and browngray shale, Calcareous become very fine pebble sarga higher in unit; 55' to 60' critical is badly covered. 10) Covered, 40' to base of Section 13a unit #1. collection 7/12/57/3 Section 13b 7/12/57h 7/12/57/2
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96 NE 34 Sect. 34 (part) [see p. 163 of Nb 2] Section 14 3/8 mile westy C. Brooks Ranch House Covered below- 1) Sandstone, light orange brown weathering, CaCO2 cement in part, a few grainy calcite. -- 6" to 2' to 3' beds -- 38' (see unit 7 pout (3b) 2) Shale, gray to brown with 2 feds (1') like 4' 17' 3) LS, silty & sandy, but abundant granules weather light tan or yellow. Brach shells also abundant. On 3"-106" bed, uneven bedding surfaces. 29' (7/11/57/4 NO.1) 7/28/58/1 chucksawls 7/12/57/4 4) Covered, 55': of other side of gully is compd, this natural is a massive calcareous, gray weathering with midgeted 6" to 6" beds. It ceps that ridge but not the one the section climbs. [Fault?] 5) LS, gray mottled colors, darker "pebbles?" in a lighter matrix; 1/2' to 3" beds irregular bedding planes 18' Cowly Brooks Ranch No. 29 p. 106 [illegible] [illegible] [illegible] [illegible] [illegible] [illegible] [illegible]
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6) LS, gray massive, 44" crinoid fragments, brachiopod shells. 7) "Hess Congs. about 10' above this last unit (6). This is on a dip slope so it is difficult to set the interval between the top of (5) & the "Hess" congls, but it < within the 10' Along the front of the central segment of the Brooks Ranch wolfcamp ridge most of the draws are the result of erosion on the zone of weakness caused by faulting. These faults have throws of 10'-50'. The LS ridges back of the ridge have several zones of slickensides which I interpret as movement on bedding planes as the wolfcamp ls was deched during Late(?) Marathon basin movement. Probably post K although I have no direct evidence for the time of movement.. The faulting perpendicular to strike cuts the Hess & Leonard so that it aids in draw forming here also. The remnants of K caps are apparently protected by differential movement on Sect. 14 7/12/57/14 7/11/57/14 These faults and can be explained in this manner. The evidence in section 13 suggests that the Goptank & the wolfcamp, limestones either converged and form a combined mass of LS, or that the wolfcamp is locking. The study of sect. 14 indicates this is not to be taken at first meets the eye. I believe, based only on lithology, that unit 3 of section 14 is the same unit as #1g section 13a. The #1"c ledge section 14 are probably the same as bed ?% 13b. The #8 ledge of 13b may
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100 [illegible] be equal to the #3 beds of section 14. The junctions may tell us the answers, but if the middle of section 13b is the Udderites zone what happens to the gap tank 15 between section 11 and section 13?; as what I've been calling gap tank in the western part of the Brooks Ranch really looks "2-15 mbr. in the w.c.H.s? You know, Charlie this could be confusing! Another question is what is the red-brown or interval which sometimes places seems to separate the massive Wescogey Limestone (king #2?) and the "New" complex mate (which as often not a calcareous at its base). I suggest the upper dolostone in section 11 is equivalent to the Congo. 7/13/57 - went to El Paso to meet John Pope (Nava's '54) (Mich. 56-115) (Cinci currently) and his wife. Charles Harden & Pete Roux left on the 12th for Austin, they were instructors at U.T. field camp, Leary's Ranch. 32 101 7/16/57 3& Section 15a - 3/8 mile NE of road into central valley on Brooks Ranch. (0° dip N 60w) gap tank? 1) LS, dark lime-gray, very fine X-talline, junctions, some beds gray to gray tan. This effort was one of several small isolated rubble heaps out from foot of cliff. This pile of LS is not bedded, but appears to be more or less in place. If the junctions are gap tanks in age then I believe it is safe to consider this out crop in place. More than 5' Collections 7/16/57/1 [Leonard Sch. excavations] 1-64 CR 2) Covered 83' 3) Shales, light gray (in part covered), 7 or 8-2"-6" sand and silty sand (quartz)-bands scattered in upper half unit; 28' 7/16/57/2 4) Sandstone, Orange brown weathering, mixed quartz sand, with select fragments of pebble (1/4th?) Brachiopods, crinoid stems, mantles, gonoliths, etc. wood fragments. 2'
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102 5) Shale, gray to bluish greenish gray, 4to5=1" v.f. sandstone bands, 10' 6) Sandstone, Orange brown weathering, fine quartz sand size with CaCO3 cement. @ few wood fragments. The lower 1' of this unit is light green gray weathering, sand size, same; difference seems to be the amount of lim oxide with the CaCO3 cement. 8' 7) Shale, greenish gray, a few 1" of sand gritstone lignite. (7/16/57/3) 21' 8) Sandstone, orange brown weathering, v.f. sand size, much silt -> 30% ; brachiopods, wood, crinoid stems; 2 to 3" beds 3' 9) like 7 in lower part, gradually, upwards, the lithology of unit 8 becomes dominant, beds 3" to 4" in the sandstone: 46' 10) Sandstone, light brown weathering, (3' of gradational beds at base to this unit into the bluish shale at top of #11. 6" to 2" of bedding: 19' 103 7/16/57/6 11) 11) Covered 23', probably blue gray shale with fine limestone bed 8' thick, uneven nodular bedding surfaces, swirls, byrgoons, crinoid back collections 7/16/57/6 - 12) Id., gray weathering, massive beds, blocks- weather rounded, (not angular) This unit has wavy bedding surfaces and seems to represent a large fuzzy accumulation of dumped debris 6" to 8' beds, 7/16/57/4 32' 13) Covered 8' probably same as (# 14) Id., light brown weathering, cliff former, 21' to 15' beds, massive weathering across unit across most of the ridge. <3' to top of ridge.
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104 Section 15b - down dy slope and across and up to a pond which is lithologically similar and the correct altitude to be bed #4 of Section 15a. 15) Covered 7' gray-green shale ground part 16) Ls, gray (light green tint) nodular wavy loding 7' 7/16/57/7 The upper 6" to 8" of this unit is now calcic. The caliche becomes less dissonant after that. This seems to have been a horizon of higher porosity that either that above or below. 17) [illegible] Calcarenite, all of about same color, probably birdlimed debris deposit - 16' no joints apparent. 8-5" beds - gray weathering, like 12 18) Covered, 10' 19) Calcarenite + organic fragments 8" to 3" beds Cinocistones + [illegible]. 7/16/57/8 12' weathers pink brown to reddish brown very uneven bedding, 105 7/16/57/9 7/16/58 7/16/57/8 7/16/57/7 7/16/57/11 20) Covered, 16' 21) "Congo, Newe". 7/16/57/9 - a collecting cobble from lowest exposed bed. Many shading ls, dark gray nearly black to light gray, white + black clasts, 7/16/57/10 - funeline in with the fines of the Congo. about 110' thick
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108 Today picture on page 96 looks like this if we can accept hinge age on the #1 log gany section 103 page 76. I believe the Nene Crag is a number pocket beaches The definite data probably of overhangage as referred to archetypal weathering. what to call this? 40 See. 40 [see P. 137 of No.2] 7/17/57 - Allison Ranch Gap Tank area- The manner in which the gap tank is covered is striking. They seem to originate in the "Udderites" zone and thicken rapidly to the east and then thin to disappearance. I wonder whether this Udderites zones is even approximately equivalent to that of the "type" area (WCHs) Section 16, North of Highway along Allison-Know Fence - Due North- Covered below- 3) Sandstone, 70% or more quartz, CaCO3 cement. Brown Orange weathering, mud (1/2 to 1/4) lamellae, even- not irregular; in beds 3" to 1", some beds are compo of many small shell fragments- 1) LS, brown yellow weathering, organic fragmented - Brachi, Bryozons, onurids, mollusca, freshwater coll. 7/17/57/1 5 1/2' 2) Covered 21' 3) and I integrate this to be litteral deposit, near whole shell of primitive brachis 7/17/57/2 [12']
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108 4) Covered, ; 2 or 3 = 6" bands of brown-orange weathering sandstones. Collection 7/17/57/3 from out hills 34' 5) LS, dark gray weathering, organic fragmental Crinoids & Brachi mainly. 7/17/57/4 at 38' 3" to 2" beds 61' (Transferred?) 6) Covered, 66' 7) LS, dark gray, with large amounts of orange from quartz sandstone in between & irregulars matrix. 8' 7/17/57/5 8) Covered, 13' 9) Calcareous and SS., light gray weathering, dark gray on fresh surface. 3 1/2" 2" to 6" beds - 7/17/57/6 10) Covered, 10' 11) LS, weathers orange-brown, fresh, brown-dark gray. Shell hard, Fasciolines, crinoids & brachi. 6" to 1" beds [4"] 7/17/57/7 12) Covered, 13' 108 13) Sandstone - orange-brown weathering, fine sand size, laminated - see color picture 6"-8" 14) Covered 22' 15) LS, mid. gray weathering, few gran Calcareous, many silicified brachiopods, collection 7/17/57/8 about 4" above base - crinoids common 6' 16) Covered, but probably like #15 - 38' to the east seems a gray green shale that looks to be more than the averaged 38' 7/17/57/12
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17) LS, gray-brown weathering, platy frag. of shells, mostly algall tracks. 1/2 to 2' lead over all weathering cleaning - 7' 18.) Covered 21' 19) LS, (calcareous) with some quartz 10-20%, cherty quartzite pebble 1% or less; weathered a mid-brown-gray, white flake-wavy unconform bedding, 1" to 2" thick; 35' The upper 40' become very quartzitic - about 85-90% SiO2 excluding cement. Becomes sparsely cemented upwards. 20.) Covered, 15', probably like unit 19 see note page 112. 8/22/58/7 and 7/17/57/9 21) LS, massive, brownish-gray weathering; convex bedding in 6" to 1' intervals, but not used "true bedding. 31' biohermal re-f., very light gray or fresh surface. very fine gravel, probably mostly recrystallized? 22.) Covered. 9' 23) LS, brown-gray weathering, dark gray or fresh surfaces. 24.) Covered, 20' 25) LS, weathers orange-brown, has minor (Imston) chert nodules - 9' 26.) Covered, 36 27) Sandstone, quartz grain mud; calcareous cement. Brown-green grains, chert + quartz. pebbles (1/4" dia to 1/2"). Laminations, some in 1/4" laminae. 31' 28) Conglo; has same sand unit as 27 just that pebbles become 4" to 8" diam and up to about 75 to 80% of lithology. 29) [illegible] [illegible]
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112 There is almost no ls in this cong, but it still seems to be the "new" cong as on other side ls buildup cobbles as high as 70%. #20 In the stream draw outcrop 20 is exposed. Calcareous shale siltstone, rich fauna fossils in verpe wash. Collection 7/17/57/9. white to light cream weathering. Becomes more calcareous and grades 2-3 into marry sidded lime to biheral sly, 35'-40' The #14 "SL"s of King's Gap tank appear to have beginnings in the "Liddlewhite" zone just to the west of gap tank. I find no field evidence which would assign a wogcamp age to King's belts in this area. But it is not until we get above that extent that we find a distinct break in lithology. 1/18/57- East of Texas Highway 51, beds of what I believe are wogcampian age (at least lithology) are folded and faulted quite boldly. The area's a syncline strikes N74W from peaky Kn or NW taking back up a valley in K on St side y road. Slides read 7-18-57-11 7/18/57/1 is from a sandstone in the creek in this syncline. This syncline is probably dup resulting from folding NE of locality 7/18/57/1 50 yds NE of locality 7/18/57/1, beds are one end; probably another fault not exposed. These structures predale K although the K was folded or even faulted (1' throw) in this zone of weakness. This little area is very complex - 2 sets of faults; one N74W axis and one N36SE.
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114 +1 Gap tank locality Section 17 - This is an un waycamp, concealed yoult on faults - Marble Sarsy w.c. There are 1) a number cherts over out pibble conglomerates and quartzite schists -- S' orange brown weathering, chertile local parts 8/24/58/1 2) Covered faulted locality distance problematical ±20' 3) Calcsinite, orange brown weathering, dark gray fresh, many pumulinities; fragments, vs. Ss matrix (Collection 7/18/57/2 Coave are slopes) 4" to 2' beds, whole partings; 9' 33' 4) Covered bed, passed once upturned outcrop marks no? fault of about 10' throw, Swest side is: at 63' the outcrop strikes me in south south - apparent cut by a fault in that direction, E.side [faulst adds about 35' to this interval better exposed 5) Calcsinite, orange-brown weathering, schist chert 17e' 6) Marbley Congrob - a conglomerate like S seems to split -- or middle part [5'] 115 8) 9) 10) 7/18/57/2 7? 1) 7/18/57/4 7/18/57/3 like unit 5, i.e. 3" to 8' beds, 4' The back of this unit has been faulted off To the best of my ability I believe found the same beds as 6, 7, covered for 13', then Calcsinite, orange weathering with an increasing % of quartz sand upward; Individual conglomer; quartzite & cherts common but with weathering; many limestone fragments to. 24' - upper part dominantly congl - lower part Ss. Covered probably the same as 9 Collection 7/18/57/5 - P.King, Charlton Ls at base of Gaptank along old road. (Way of Cahaba) -- at type area.
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The Kxss didn't recognize the complicated structure of the gap area. I believe there "#143" unitank is on the same bed, faulted into 2 portions. The N75-90°W faults do this and the N-E faults tend to make the units appear thicker than they are normally. I conclude that eastern most "upper" Wolfcamp contains Tenney (Haymond) & Dimple. The Dimple in very dark is, the Tenney Haymond are quartzites. The massive is out of the wolfcamp - seems to grade laterally into bed 3, section 17, but faulting may make the picture more complicated. This is look like the only answer to the grouping of just even to place these "upper" Wolfcamp beds in Section 17. The conglomerate would suggest it should fall & called here, but the catalogues similar to the upper Wolfcamp. The fossils suggest an association that seems related to the Widowmaker - level. Of those beds are [illegible] slightly more coarse than the upper Wolfcamp. we are about 12 miles away & - There is no typical couple of the Kxss before we get into the salty portions. We ride here. Problems! It will pay to investigate the outcrops in the canyon south by the Allen- Panch. The "wolfcamp" may be shoved there, but I really wonder!
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118 7/19/57 Mr. Moore wasnt a home (Ranch); lives in Madland. Devis Ranch. The conglomerate lithology C.O.D. pointed out as wolf camp pinch the place extends out to the S.W. The dismembered layers of Jarsy mentioned near the road, I believe are SW extension of the lower Hess ledge. The lower Hess ledge 1/2 mile NE of the first stop contain "wolfcamp" with conglomerates high into the units. The Lower Hess ledge is seen covering 1' to 3' LS at this SW locality but the cover beds become massive to the NE and the upper LS of this interval gradual thinned out within 1 1/2 miles to the NE. The conglomerates below look like there SE NW within the Hess (lower) ledge. At this SW locality I believe Jarsy has misidentified the upper Hess ledge for the cover Hess ledge. 119 Collection 4/19/57/1 - a LS cobble in the wolfcamp Conglo. From a pea black, but appears from lower 1/2 of exposed conglomerate about halfway between Windhill and stop 1.
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120 6 7/20/57 Deer Ranch SW end of hills Section 18- 1) Conglo, baxly caved. have a Caly Flag and Gyp pebbles, gray var matrix, a small amount cement, Ca CO3 cement. Not knowing if the dips are significant, level level up through the conglo beds. This unit is in part covered, but the conglomerate are coarse and are the only outcropping rocks- 55' Cobble of Conglo-Collector 7/20/57/10 3) Covered 4'; 2) LS, gray sandstone, some minor amounts of fragments of chert, dip about 10°WNE. Grain within this LS unit are quite conglomerate. The chief distinction between these #2 and ls sand is the matrix. The conglomeration petrified in about 7', but r.f. pebbles are present in the 15 higher in this unit. Top of unit is very silicous, well sorted from a 1" plate. Bedding-below is 1' to 4'; 52' This unit is also equal to lower Hess ledge. 4) Siltestone vs sandstone silicon cement Can vary but often irregular texture; Silicon cement is 2ndary see 7/20/57/1 11' 5) LS, clastic, with ched pebble 1', thm to NE. thickers to SE 6) like #4 5' 7) like #5, 1 1/2', thicker to SE 8) like #4 6' 9) LS, clastic, 3 beds 4" to 8" thick, each with well sorted flat tops, separated by siltstone; 3' 7/20/57/9
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122 10.) Covered 3' 11) LS, congo, chert quartzly pebbles; to clastic sandy matrix. 1' to 2' beds; Top is same old flat surface, well sorted, and silicified 1/2" to 1". 9' 12) Covered, clayey, probably clastic LS, congo. 13) LS, organic frags, bryozoans, crinoid (stem) brachiopods; 7/20/57/2 ; 1/2' 14) Covered, 5' 15) LS, organic clay. 7/20/57/3, rubbly at base becoming [illegible], well sorted in upper 6", top 1" is silicified and laminated, top is flat. 2 1/2' 16) Covered 5' 17) LS, organic frags clastic, some small chert granules - a few lines or so, echinoid spines [2'] 18) 17' covered 123 7/20/57/8 22 7/20/57/4 21 19) 18 17 20. 16 15 14 13 12 11 10 19) LS, fragmental (organic) and quartz sand matrix, crinoid frags & track trails, become more sandy upwards. 9' 20) Covered - 6' 21) LS, clastic, gray weathering like the other lower clastic LS, fine flat top w/1" silicified zone 8" to 1" 7/20/57/4 5 repeats of this lowest unit (at least) in 8" to 3' beds; 18' some chert clasts 7/20/57/8 near top 22) Sandstone, rf. size, weather light brown thin but uneven laminated. w/ 2,3" lbs. of the #21 type. 9'
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(124) 23) LS, clastic + organic frag, gray weathering with a tinge of brown. 2 cyclic beds one (a) 3' ; (b) about 4' Collection 7/20/57/S That tops are silicified + weather a brown iron oxide color. 7' 24) Covered, 14' 25.) LS, calcsandite, both clastic + organic frag. weather by gray brown. 1' to 2" beds 12' Lamination & small echinid spines N70E 26) Covered, 31', probably brown v.f. sandstone or siltstone. 27) Maic? This unit is worth additional study. Wave-like Rx, no bed except near top in a irregular surface. 2 kinds of siltys; one light brown, one light gray - they occur interlocked with each other - also coarse sandage clast + ls fragments are twisted and warped through- out this bed. Several kinds of brach shells, Bryozoa, & fusulinace I believe this is a bed of slumped material. (125) 7/20/57/S on our studied Permian sea-shore deposit, a 3" diam pebble is staring at me. 1 1/2' 28.) 7' thick, brown weathering, v.f. sandstone. 29) LS, gray (clay) clastic, some 1/4" diam clast & quartzite, 1/2" red brown silicious upper surface. 6" - 30) Like 28., 8' 31.) LS, Lt. brown to gray brown weathering; very siltys and v.f. cc sized - an irregular 3" band of very fine pebbles. 1/2' 32) Covered, 13', probably like #28.
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1/26 33) Siltstone, very limy, & brown to brown/grey weathering. 6" 34) Sandstone & siltstone, sandstone of grain grades into a 1' to 1½' lime rich resistant beds. [8'] 35) Sandstone, silty sand, & brown weathering up to 1" bedding - 23' 36) Covered, 5' 37) same as *35 - 8' 38) LS, gray weathering 8", have little cephalopod on it. 7/20/57/6 39) Sandstone, ungrained, & brown weathering 8' 40) LS. Massive, gray weathering, bioturbed. Upper Neez Ledge 1/27 7/20/57/6 7/20/57/7 Collector 7/20/57/7 - a pretty flat, found at about bed 34 - it's a grayls or is either from about *38 or, most likely from *40. Upper through bed 24 of this section the sequence of lithology is rather cyclic. Even the Neez(?) in its upper part shows cyclic deposition, but with the change of either source of sediment or depositional environment. I frankly don't know exactly when to draw formation boundaries (the topy bed #1 on the top of the Wojcany Congs, the bed #2 limestoneed below is equal to the lower Neez ledge. King calls the lower ls Ledge Neez, and the upper Ledge, the 1st Gerard ls mbr. Section 18 thus includes Wojcany (part), Neez, and Cover Record rocks.
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128 7 7/24/51 Section 19 - up to eastern meet Cliff joining Wgcamp Crags - topped by Brea & Lidge Brea Ranch. The lower part of this section is covered and as jumbled up no day 0) Covered below 1) Sandstone, green-gray weathering, much green vitrinal, 6", Collection 7/24/57/1 2) Conglo., brownish weathering, mostly 1/4" to 1/2" clust pebbles, brown sand, some but few crinoid stom fragments, 5', 7/21/57/2, 2" to 6" thick 3) Covered, 10' 4) Ls, mid-gray weathering, bihermal, no digurate bedding, large cephalopods, crinoad remains, probably too large for Penn., could they be Perm?) brachiopods - 29' Collection 7/21/57/3 (Rained out!) 7/24/57/1 7/22/57/11 7/21/57/3 7/21/57/2 7/21/57/1 129 7/22/57 (quartzite) 5) Ls, wt 30-40% clust/jebbles - gray to gray brown weathering; a few ls pebbles. 3' below, from about middle of unit upwards, larger ls. cobbles appear, a few lons are nearly sandy (coarse); 46' it should be noted that the upper 2/3 of this unit could probably best be called a Conglomerate. The ls. is nearly completely lacking except as cobble in the upper cliff. about 5% or less of the upper rock unit is ls cement. 6) Covered for most part, exposure are conglo, clust & quartzite, ls cement. One big ls block at 38' (Collection 7/22/57). 145' - I'm separating this as a unit only because of the weathering characteristics. 7) Conglo, poorly sorted to no sorting, clust, quartzite, ls. pebbles; some small cobbles - lime cement. 2 flaws, cliff forming. Become coarser (small to med. boulders) upwards. 84', 1' to 20' beds. 8) Covered - 65' this is probably the extension to the west of the green gray shale + calcareous conglomerate.
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130 9) Conglo., brown+gray weathering. 13, chert,+ quartzite pebbles, brown sands, not sorted; last covered. 3' or more. (7/22/57/3) 10) Calcarente, dark brown weathering. zones of pebble (10%) in calcarenite. 2" to 2' beds very irregular channeler in top of bed 10.; 22', has a flat top, siliceous clastics are dominant. 11) Conglo., chert, quartzite + Co., limestone locally cemented so make this a calcarenite, but chert+quartzite dominate almost (within 5' horizontally) (7/22/57/4) 35' up (7/22/57/5-43' up. This unit becomes predominantly 1s in the upper 10' (650%) has crinche, byzozona, anroid stems, + corals, between the funicles. I think it could be called near biotural both in formation and position during Pra. 49' Brown dark brown and gray weathering Has blocks and small lenses of light brown silt which weathers out leaving ruggy appearance. 130 16 7/22/57/12 7/22/57/8 7/22/57/9 7/22/57/22 7/22/57/6 7/22/57/5 7/22/57/4 12) Calcarente, med gray weathering; has gravel size organic fragmental, 6' collection 7/22/57/6 2' beds 13) Partly covered - apparently alternations of brown silt + sandstone and calcarenite 3 cycles - 6' - 6" to 1' ls. Calcarentes in 12+13 have flat top brown silicious stained.
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132 14) Conglo, about 6" grading up into a rubblly algal, sponge, a few peawlines which may have been transported around stones 6' 15) Sandstone light brown. 1/16 to 1/8" beds - 9' 16) LS, Calcareous with organ frag gronval size. 1' 17) Sandstone brown - 6" note: here the calcareous is angular at its base and roots on eroded weathered brown sandstone - (apparently the major break in sedimentation?) 18) Like #16 2' 19) LS, biobernal, gray weathering with brown conglo chert pebbles. 7/22/57/7 6' becomes a calcareous at the hp (2') and a flat top surface w/silicious iron (brown) weathering. 133 20) Sandstone, brown, like #15 - 4 1/2' 21) LS, rubble, with chert conglomerate, ex. conglo cobbles: grades into a calcareous (cupper 6" to 1") with a flat, silicious iron stained upper surface. Coll. 7/22/57/9 7 1/2' 22) Sandstone, brown weathering, much and calcite with the fine quality sand. 2' 23) LS, massive, brownish gray weathering chert pebbles, and ls boulders scattered in fluv. - 15' 24) LS, mostly calcareous - 4 cycles of rubble, through calcareous to flat top with silicious iron stained; 21'; (at top 7/22/57/9) top of ridge 50' NE of measured section a chert & quartz conglo has cut a 8' channel in unit #23. This conglo appears very much like unit 8 (in the lower part).
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134 The congo intervals 1 through 8, thicken NE ward toward the old Denny dry hole. This is accomplished by a slight thickening of individual beds in that direction, but also by off-capping what are apparently large channel bedding. SW NE B(part) 35 Sect. 8 [see p. 7 + 143, + p. 96 of No. 2] Section 20 - wolfcamp over the Gaptank angular unconformity. gaptank strike N 75W dip 9° NE Collection 7/22/57/10 + 7/22/57/11 in gaptank at this point. L3 1) yellow weathering, yellow exposes high % g silt, shot through with calcite veins. 7/22/57/10; 30', covered below 2) L3, biochemical, yellow weathering silts, chert pebbles + like cobbles, 2 beds, 14" (coll. 7/22/57/11). 3) Conglo., brown weathering, cherts, quartzites and grayls., brown sand; this unit laps up side a high [top] in #2 bed and finally covers over the top. Strike NO. 30E, dip NW 11° 29' ① ② ③ ?
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136 4) Sandstone, brown to gray-brown, yellowish weathering; purples, magentas, orange locally. 14' 5) Conglo. brown weathering; has sand of #4, clasts & quartzite (but either no l/s.) mid. pebbles has the dark weather coloring #4 - 2nd day! replacement 6" to 4' beds 14' Moved SW along bed 5 - 100yds, to a point opposite bed. 6) Sandstone, yellowish to yellow-brown weathering; 1" to 3" thick, a lot of xlt and fine to v.f. sand sizes; quartz, poorly cemented. 6' 7) Conglo., pebbles of clast, quartzite, l/s.; light gray brown sand matrix? 4' 8) Shale, brown some grayish blue; a 5" brown weathering sandstone top, total 6' Coll. 7/22/57/12 9) Conglo. like # 2 1/2', with 2 interbeds of "8" 10) like #8, with 2 - 3"-4" conglo beds like #7 [8'] Hueco Mts 137 11) Conglomerate, pebbles & clast, quartzite; brown sand matrix; weathering brown to brown-gray. 2 beds, one 2' marine, upper one is 1' flat top & four wards of 3' Hueco Mts 7/25/57 - Van Horn area, Eagle Mts, east side Collection #7/25/71 - shale zone size shells - etc! Covers 1/4 of outcrop. This is James Underwood's Jennie area. 7/25/57-2 outcrop? (Suff 7/25/72 g lane interest, left) NE end of way going NW & Eagle Grays Ranch North - near canyon hill marine, dark gray l/s. 7/25/57/-3 /4 to 6' above 7/25/57/2) Like Nueces? as appears in several locations here: a) Jim Page/Jennie area in the Van Horn Mts the Nueces is a dark dolomite in its entire expanse, above the Portland Conglo 800-900' b) In the Eagle Mts. & in Underwoods area the Nueces becomes sandy on the lower & upper parts; more dark gray l/s (calc?) with middle grit?
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138 The Nuevo separated in Page Swires' area is a dark fited dolostone, schistoid spines and some productive cracks are silicified prior to dolomitization, but nearly all other possible have been dolomitized and either completely lost or lack any structures; just outlines. In the Van Horn sects there is about 600-900 ft of Nuevo - about 40-50' of Paw Paw Congl and transition zone. It is similar to the basal conglomerate of the Wapca p and contains siltstones and sandstones possibly the equivalent to the clastics zone, but not the same series.) In James Underwood's area the Nuevo - about 600-700' in the eastern locality (7/25/57/1) and perhaps thicker in the NE locality (7/25/57/2 + 7/25/57/3). These last 2 localities are near the base of the base of the unit but the exact longer was not determined. There is some structure complications in this area and so more detailed work is need. The presence of siltstones & shales and sandstones in the first locality suggest the lower Vs a lower Vs are deep seated dep basin dep as to like the middle Vs 139 7/26/57 Coll. 7/26/57/1 from heavily sugurous rock - above Boguillas ls (K) - this is a possible freshwater ls in pre-volcanic times. Black Peak east of Wylie's Nat. Coll. 7/26/57/2 - SE. of Van Horn about 15; The S-anticline, western most peak - 7/26/57/2 trachyte 10' calcicorite + tuffa 200' water bedded tuffa trachyte but rather are near the margin of the basin, probably the SE side. I've promised Jim to let him know what juelines are from the 273rd locality. I judged a measured section in this larger region came to promise little in the way of juelines. See: Baker, W. & Fed Bull 2745 (?) Wichita, 1963 USGS PB 887
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140 7/27/57 - Wolfgang Kletz showed C. Bean around area. Coll. 7/27/57/1 - Uddenites zone w. side geologist's Campus saddle. Coll. 7/27/57/2 - Float, nearby "22, section 4, see page 35 Coll. 7/27/57/3 - see page 52; bed 15, section 6. Coll. 7/27/57/4 - Uddenites zone (bioherm locality) NE of windmill on main reef. James Robert (Robby) Moore, Tex. Co. Research Lab., Houston, Tex. mentioned many of the oil company fellows find the Niles in the Wexler [illegible] (Texas) part is equivalent in age to the Wolfcamp in the type area and eastward. Also that the Brachiopods and the Foraminifera may indicate different ages in comparison to other areas. Robby gave me a couple of samples from Reed Shafter, Tex. He believed Perm. age. They contain orbituloida and a couple of mollusca of undoubted upper K age, probably Georgetow 141 Why they on the cyclic bedding in the upper Wolfcamp is as follows at the present times: 1) Drainage of wolfcampian Basin to N. Deposits of gray sand siltstone & a few siltstones gradually filling edges of basin, but beyond "gray" facies. 2) Bichemical activity encroached on this more or less flat bottom "mud" flat from west (to south) in a northward direction. This accumulating until wave action takes over control. 3) The wave action sorts and worked the later deposits of the biochemical deposits to reduce grain size, increase relative % of quartz & form laminar bedding in upper sand or so. Bypass was important and represents a significant time of lost record. Repeat back to condition 1. S. gaptant N. upper wolfcamp Uddenites shale There is more to this than just this simple diagram - The east west facies change leaves room for more questions than I have answers at this time.
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(142) 7/28/57 - to Big Bend Park Coll. 7/28/57/1 - 2% So. of Marthas Ellen Rock upper mail zone; Orbitolina terana. 7/30/57 Collection 7/30/57/1 - Light gray shale beneath fresh water cl. in ripian between Palomby & Sturg Obs about 26 miles East Alpine. Tuff dy. Escalrich Cliffs (Chp. Tex. Bull ?) - They are now covered age to Houston Point tuff - signifier Etex #1 Big Bend Guide Book Collection 7/30/57/2 - Is part of fresh water sequence above. 8 (part) Sect. 8 (143) 7/31/57 [see p. 7 + 135,+ Section 20, (cont) - dip 10° NW P. 96# No. 2 11) Covered, 30', probably gray-brown shale for most part 12) Calcareous, greenish orange-brown weathering, poorly sorted at base, includes dark patches; wt. green quartz sand, Brach Crenoid & fusuline frag. The lower part ex near a granular or fine pitted conglomer 4" becomes well sorted. Collection 7/31/57/1 Wood frags common, bryozoans common. slightly muddy upper member (3'1/2') 13) Covered, 13', probably gray shale 14) Gray shale, with brown tinge: Collection 7/31/57/2; 5' 15) Calcareous, like #12; but conglomerate larger, 4'1/2", becomes better sorted (Coll. 7/31/57/3) and finer in upper 4"-5" flat top surface 16) Covered, 11', probably mostly gray shale
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17) Calcarente, yellow-brown weathering, becomes well cemented and with delicious pebbles in upper 5"; 1/2', Coll. 7/31/57/4 from #17 and loose stuff, probably from whole just above and just below #17. 18) Shale, gray to gray-brown, slightly silty 12' 19) Calcarente, yellow-brown weathering; lower 8" are pebbly congo. a 1/2" shale breaks at the upper 4"-5" are well-sorted, evenly laminated quartz sand + calcite sand, fine size. flat top with an Florida type g.l.f. sand size. 1' 20) Shale, brown-gray, 28' near top Coll. 7/31/57/7 near base Coll. 7/31/57/18 21) Covered, probably like #20, may have several calcarente (gray) beds. 26' 22) LS, gray, with a large % (25-30%) cobble congo. This might be best called a congo with ls cement locally. Beds are 2 1/2 to 5' thick; 18'; Coll. 7/31/57/5 23) Covered 5', less resistant zone of silicified fine sand? 24) LS, massive, locally congo (quartz A clut) med gray weathering (see 6/24/57/2); upper 3"-4" beds in fine-grained, flat topped. 25' biocermal "less ls" of King Coll. 7/31/57/10 25) LS, subtle, some congo cobbles - lenses of 6" to 3' beds - contains biocermal gut trussides, bryozoans, large fusulines, brach. Coll. 7/31/57/6; 3-5'; This unit thicken to about 8' to the SW just above the Kintayaw dense - (about 200') Section 20 continued about 200' to SW above Kintayaw dense - followed at top of #24 25) Sandstone, light-brown-gray grading up into a complete organic frag. hash. Has a well defined planar top with iron stains + cement. Ietrocoals common; also produced shell frags.; 8'
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146 7/31/51+8/1/57 26.) Covered, 15', one 8" bed of silicious pebble conglomerated in middle of unit, rest is probably gray shale(?). 27) A series of orange brown weathering, friable congo, grmmenustrated at base to well sorted mass at top, with flat upper surface - upper 2" are well cemented with SiO2. Coll. 7/31/51/9 at base Several beds of silicious s.f. sandstone or siltsh 10' E # 28.) Shale, (dark) gray brown- 3' Coll. 8/1/57/7 # 29.) Calcarente, orange-brown, organic frag., jute? possible oizes; crinoid stems, echinod spines. 6" # 30) Shale, mud gray brown. 2 1/2 # 31.) Like the beds in #27 - crevician? friable 6"-1' # 32.) Shale, dark gray 16' # 33.) Calcarente (with high % of clut pebbles too) groding upwards through calcarenite to quartz sandstone with iron oxide cement. weather - pale yellow brown to a deep orange brown at top. 1" thick part of Shale top. 1 1/2' 147 36.) Sandstone, weathers light tan to buff. grodes into a siltstone and then into a shale. The grater shale is dark gray. 9' # 28) Covered 12', probably mostly dark gray shale # 29.) Shale, dark gray; and siltstone, weathers light yellow brown. These two lithologies grode both and forth horizontally as well as vertically 16' Coll. 8/1/57/6. 31 38.) Calcarente; dark gray (juted); weathers red and yellow brown. fully friable Collection 6/24/57/7 1/2' Surface silicification of fossils; also the upper surface is flat, well sorted, laminar fine calcarenite with siliceous zones. 38 39.) Siltstone, light yellow-brown weathering; with lenses of calcaronte siltier well sorted but not laminated. 9 1/2' 39 40) Covered. 15' Coll. 8/1/57/5 from a poorly exposed bed in middle - like #40.
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148 40) Calcarente, light gray yellow, darkgraying juralines, algal mounds and other fossils. irregular lenses of tan siltstone in various attitudes to bedding - 3' 8/11/57/4 41) Siltstone, finely laminated, yellowbrown light weathering. Grades upward into dark gray shales; 29' 42) Calcarente, organic frag.; brachs, trygrams, crudidstone; echinod spines; juralines. 1' 7/26/58/7 43) Shale and siltstone; some mudstone, (light) weathering (dark yellow brown); dark gray on fresh exposures. 42' 44) Sandstone, light brown weathering, rust graybrown on fresh surface. Has fossil folds, in honeyard, very silty in upper foot. 1' 45) Shale and siltstone, light yellow-brown to mid gray weathering. In upper 2' fth., lenses of organic fragmented ls appears. 29' 149 46) LS, organic frag.; mid gray weathering; tetracoral, large crinoid stems, brachs, trygrams. Bottom is irregular, seems to follow cut or eroded top of #45. The top of #46 is smoothly undulatory, siliceous upper 2" 8" to 1' (shave siltstone tongue toward drain 47) Sandstone, v.f. quartz, very silty; light graybrown weathering; no apparent bedding. irregular blotches of varying shades of colors. 0-1' 48) Siltstone, light gray brown weathering; Grades an irregular topy of #48, in some locations meets directly on #47. Fills the trough or ground evenly and within 1/2' feet is evenly bedded. 14' 50) Calcarente, v.f. grained; weather light bluish gray. Rich in brownish silt. Has a small- coiled cephalopod gamma, we had 38, sect 17. 21' (a unit like #51 between the 2 ls side of this unit) 50) Covered, 9', probably similar to #49 lt brown, sandstone very silty, poorly cemented. 51) Calcarente and chert-quartzite Conglo. with one or two siltstone beds. 8' light gray weathering except for chert+quartzite patches, some ls cobble and clay
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(150) 5V52) Ls, organic lag; light gray weathering Products: crushed cobblews; upper 2" rich in siliceous cement + fossils. 2 1/2' 53-54) Alternation of limestones like 52 and siltstones like 45; at least 4 alternati intervais are poorly exposed; siltstones have silica bands. 12' # 55) Calcarenite - cobbles 3" to 6" diam; about 5% or less siliceous rocks in this unit. 8' This seems to form the base of King's basal Leonard Bt. 8/1/57/3, float found near bed 43. I believe it has come down from either the lagging bed 50 or in the Leonard above. 8/1/57/10 - NE q Section 20, 200 yds, from bed #24 - one light colored block, gray ones are in matrixy rock afternoon (8/1/57) walked along Wolfcamp central to the NE about 1 mile. The upper whole of the Wolfcamp is poorly exposed along here and even the basal conglomerate of the Wolfcamp is incompletely exposed. The Dimple is exposed in a window (?) on the Dugout Creek Thrust sheet. A Dimple is the apparent source for much of the lower Wolfcamp Congl at this point. Collection 8/1/57/8 Daymond ? is exposed just to the SW of the Dugout; (8/1/57/9) is from sandsilt in Daymond. SW NE Section 20 #24 + Shale conglo Daymond / Dugout \ // in Wolfcamp.
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Coll. 8/11/57/11 - This bed is dipping slightly toward the town of Marathon, not a good exposure, but believe this is Gaptank shined over Haymond onto Dimple. The diagram on page 151 shows 2 beds by thickening + thinning. This is really caused by a fault - bearing the NE side about 60 to 70° with respect to the SW side. The thickening and thinning of the three limestones I'm sure does take place but perhaps not on the order of magnitude pictured on page 151. Sullivan The Dickard Canyon fault cuts the NE end of the Decie (Denver) Hills. The lower Leonard is ex cropped on the NE side to a point below the Three Sockinella reef. The picture was confused by several unrelated or related fault blocks, in parallel to main fault system. Just SW Windfall in line with the Dickard Canyon fault, there is evidence of a fault - the NE side has black shist (James or Dimple) faulted against above? or gaptank orange-brown sandstone. The amount of cover NW of the place section 20 was examined observes the geologic relationships. I believe the angle of the lower Wolfcamp is missing in part and pinches out completely over a couple of Haymond and Dimple (Welfcampia) beds. The evidence is slightly negative because what I believe is Gaptank sandstone (orange-brown) has no conformable cover. The Haymond clay+ sandstones are exposed very close to the lower vacchini clays of and no single exposure typical of the lower Wolfcamp. These faults according to P. King's map line up fairly well with the 3 that flank the NE end of Cathedral Mt. He maps the black shist as Ord. marathen "V unit." The orange-brown beds as gaptank they look much like some of the blackish shales in the Eldershots zone, however. The Dimple shists are present in great abundance in the conformable (e.g. sample 8/11/57/1) which may represent the lower or basal portion of the Wolfcamp.
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Lemert Hills near Sullivan Ranch Road. P. King has mapped the Ness as being faulted about 50 to 75' down to NE unknown fault. I believe there are several similar faults, parallel to the main one. I will sample from the section below the NE [illegible] not, but I believe the Leonard is faulted below the Ness at this point and the Leonard clay of Leonard is caps it. G.A. Cooper in The West Texas Perm. Guide Book 1957 mentions that it seems to be Leonard, 8/2/57 Sect 9 Section 21 - Sullivan Ranch Road at NE end of Lemert Hills. P. King called this central Wolfcamp, I believe it is probably these. 0° dip for measurement. 1) LS, mud gray, more or less massive, forms lower party slope - 8/2/57/1 The lower 5' of this unit contains chalk pebbles (fine) in well defined bedding band. Dev. & Ord. shales. Upper 1" is orange-brown well sorted total 34' 2) Covered, 34'; patches of light brown siltstone and sandstone crop out here and there in this interval but no definite relationships were determined. In the upper 15' several biochemical rubble IS appears to be present. 3) Muds & dark gray calcareous; well sorted, upper ½" is dark siliceous rich. 1' 4) Shale + siltstone, light brown 1' 5) LS gray with a tinge of brown. Biohermal rubble - Crinoid columns 2" or more diam. 3" to 2' beds - total 5½'
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156 6) Covered, 7' probably smoothly light brown shales and siltstones. 7) Calcarenites, mid-gray to orange-brown; a few small pebbles; near base grades into fine sand and near top, upper 1"-2" siliceres ferrie rich. 2' 8) Covered, @ 25', this seems to be light brown shales for most part, some siltstones and some very fine sandstones. 9) LS, organic frag.; some black chert (Ord.?) Grenad siliceres, digyranus and juruline. 14-1/2' 8/21/57/2 10) Shale, siltstone, + v.f. sandstones; light brown weathering. 17' 11) Covered, 21' 12) Massive LS, light gray to light tan weathering. lower 6'-10' have large LS cobbles, small amount of fine chert pebbles. Coll 8/2/57/3 58' This unit has been discolored Top of NE mout knoll. None used 159 Section 22 - NE of Sullivan Panel Rd. Starts between 2 windmills. [no thesis sec. #] [see p. 129 Nb.2] gap-tank below is badly folded + faulted, chert congl. breccia in the greenish chert, beds of chert below seem to well bedded and not extremely broken - gap-tank is represented as well as brown sandstones. 1) Congl., much chert and limestone cobbles. brecca cemento matrix. dips about 15&N; 20' become fine upwards, some organic fragmental material comes in. 2'-3' beds. 8/12/57/4 2) LS, mid-gray, nearly organic frags., some small chert pebbles. Crinoid stems dominant. haz fernish line (weathered), Coll 8/2/57/5 about 20' up from base. Coll. 8/12/57/6 about 60' up from base- thickness - 78'+ The upper beds dips about 45 to 60°, I suspect this unit is faulted Leonard, a thin litg. upper here is #1 and no lower Ners or Wolfcamp at all. Leonard or Upper Ners rest'g on Dingley, Haywood Jones & Calbooms.
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158 [illegible] walking over the outcrop as far as the Desie fence line there seems to be no exposure of rocks other than those in section 22. The green-brown silty sands (Raymond?) is in a very tight syncline or overturned anticline which strikes near E-W parallel with the faults at Leonard. I believe the displaced rocks are faulted down because I can trace this structure about a quarter of a mile. The [illegible] Colorado breccia zone is quite thick here (40 to 50') and has an upper surface which appears slaved out. It dips steeply to the N (at [illegible] as much as 55°). This surface has since been distorted and is now cut by many 2ndary faults. The complete field relationships of these beds are unfortunately [illegible] concealed. Coll. 8/2/57/7 - Blue shale 20' interval below Alexis Is ledge, N45°W of Desie well near windmill. 159 Coll. 8/2/57/8 - Biolumal or Biothermal zone in base [illegible] Congs. (G.A.Copper locality) almost due west of Desie well- near windmill. It would be nice to check the outcrop on the Den Ald Ranch that P King mapped as [illegible]. The Leonard Aff section will have to suffice. Why should P. King have missed this important structure by the Sullivan Ranch Road? Probably didn't walk over it (?) 8/3/57 - Shipped 138th rock specimens in 3 packs, the heavier two were double gunny sacks. End of Book one 1957
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Typed from original by C. Ross in 2002± C.A. Ross Peabody Museum Yale University New Haven, Conn. FIELD NOTES BOOK 1 Marathon, Texas, Summer 1957 Study of Wolfcamp Hills and Wolfcamp sediments along south front of Glass Mts. - C.O. Dunbar visited me on the field on the 22,23,24 and 25th of June, 1957. June & July, 1957 PG. 1 6-22-57 (Neal) Taylor Ranch-Wolfcamp Hills-Sunny-Warm. Collection-6-22-57-1- Upper of P.King bed 2- point over Geologist Canyon- 200 yards north of Uddenites Saddle. {note: illustration: P.King's Bed 2: layer 1: 20' layer 2: 4' layer 3: 6' layer 4: 4'} Collection 6-22-57-2- From about middle of P. King bed 4- 100 yards east of turn of Creek Geol. Canyon. PG. 2 Hess is a limestone sequence and under lies the Leonard which is siliceous-The Leonard just beneath the sill and top of Wolfcamp is calcarenites, and often very silty- well bed. The Hess Conglo. is "white". The western end of the Wolfcamp looks like a good place to measure the Hess Conglo. and to determine fusulinid sequence in the Lower Hess (or Leonard) - Check this section against the conglo. sequence on the north fork of Geol. Canyon. Question to think about: What is the nature of the cyclic deposition of the Wolfcamp sequence? The limestones start off with rumble and then go up through clastics which become finer and finally are present as finely laminated sand (calcareous). These laminae are similar to the individual sets of beach deposits in Lyons Ss. What cause cycles? What conditions changed to cause deposition of Hess Conglo. and Leonard silt and claustic beds?
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C.O. Dunbar and I drove around east end of [Wolfcamp] Hills and got back side- road not so good. Walked the eastern exposure of the upper Wolfcamp (P. King beds 4 to Hess Conglo.). PG. 3 The fauna needs to be studied from various points along the same bed for the length of exposure. Reef nodes form in great abundance on P.King's bed 9 to 12- this cause uneven, distorted, limestone ledges just above-result of differential compaction. PG. 4 6-23-57 Cool in morning, sunny, some haze-dusty and hot in afternoon. Regional showers in late afternoon. Went to Hess Ranch and to spur of ridge around which road winds- C.O. Dunbar explained section to top of ridge roughly as follows. {note: illustration: "Hess Conglo.": bed 1: 75' or more, chert and limestone pebbles conglo. bed 2: 60' +-, 6-23-57-1, fossiliferous limestone (Wolfcamp) bed 3: 100' +- dolo.} The age of the dolo is questionable - The "Hess" Conglo. has Wolfcamp fusulines overlying it- so that the conglo. is apparently one of the Wolfcamp series. The possible correlation of the above section with that of Leonard Mt. needs to be definitely worked out. 6-23-57-1- Spur above Hess Ranch Home- just east of fault, about 15-20 feet below base "big dolo" ledge (about 10' below "rusty" layer). PG. 5 {note: illustration: "Leonard Mts. Section": bed 1: Slump? Fault? bed 2: Gaptank? Uddenites shale - G.A.C. has _?_. (This probably from Talus slopes- not much strat. value) bed 3: Wolfcamp. Conglo, _?_ bed 4: Limestone beds bed 5: dolo bed 6: This is loaded with Fusulines. bed 7: Leonard? What happens in the lower part is really a question, beds are mixed up, short horizontal exposures and great variances of dips. "Wolfcamp" of King - Tenus} Uddenites Shale- east side of Geologist's Canyon 6-23-57-2. 6-23-57-3- West flank of western main reef noted in P. King's limestone 2 due north of Neal Ranch. {note: illustration: North side = 20'; Well bedded, limestone, which thin between reef heads to about 20'.
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6-23-57-3; cobbles of limestone and organic fragment debris - Bryozoans, Dictyoclostous [brachipods], Crinoid plates. South side = 80'; Massive reef head in P.K. bed 2.} PG. 6 Uddenites zone- Brown weathering material in limestone- what is it? Section along face of Mid Hills {note: illustration: Uddenites member: Upper Gaptank limestone of King. #2 limestone in between west and east section.} Note the great changes in thickness of the Uddenites shale- The contorted bedding of the upper Gaptank limestone, the biohermal nodes and variation in thickness of other beds- Trace these out and try to find out if the Uddenites member is along a facies, a time units, which may have been deposited as the Gaptank was being deformed, time of deformation- what is structure of this? joints? what about joints? about the draped limestone over the higher biohermal developments? PG. 7 6-24-57 Sect. 8 (part) 1st limestone ledge about 20' above top of Wolfcamp Conglo. in Section Carcajew nest in Lenox Hill- ref. C.O.D. 6527/34 collection 6-24-57-1 is in same horizon as his- see also 8-12. 6-24-57-2- From same section as -1; This is from a large block of limestone. 3'x2' in the Hess ledge- The ledge itself is a Sacchinella- Leptodus reef with medium boulders of various rock types in it. This block from which this sample is taken is apparently on edge in the rubble of this reef. {note: illustration: bed 1: 6-24-57-3 (8-24); crumbly limestone (with some clay) with pebbles. bed 2: 5'; dense well bedded limestone. bed 3: 5'; gray. bed 4: 8'; vuggular limestone (Carcajew nests). bed 5: 15'; massive reef breccia. bed 6: 5'; bedded limestone.} The exact base of the Hess is questionable here- any of these lower 3 contacts would be acceptable. PG. 8 {note: illustration: layer 1: 6/24/57-3 (8-24); (1) a gray limestone with fine to medium pebbles and abundant crinoid stems and shell fragments. bed 2: bed 3: dark gray, thin bed shale, 1' shale, is like (1) bed 4: 8' thick (like (1)) bed 5: dark gray, thin bed shale 0'-3'. bed 6: 6/24/57-4 (8-24); limestone lense.}
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The fusulines in -4 are possibly weathered out from lower horizon and redeposited in pockets in the reef facies. C.O.D. believes these are at least superficially similar to those of collection -3. The contact between the massive cliff forming and the underlying could be either a cut surface or a squeezed surface. The way the lower limestone units in the siltstone lens in and out would suggest a facies change and not a great unconformity right at the base of the Hess ledge. PG. 9 Collection 6/24/57-5 - at the base of Upper Hess Ledge, 250 yards south of gully 1st head lg. which follows down Carcajew section. Unit 53, Section 8. Collection 6/24/57-6 - a fossiliferous (8-37) horizon in Hess which is 1/2 way more or less (80') above the basal Hess Sacchinella limestone. This interbedded with the siltstone, sandstone (CaCO3) iron - chert stained. Collection 6/24/57-7 - slabs of a fusuline and shell cochina-45' +/- above top of Lower Hess Sacchinella limestone reef at Carcajew section. PG. 10 Gaptank type area. Clear and sunny. loc 1 6/25/57-1 Collection from a limestone within the upper Gaptank conglo. of P.King on or close by to the type section. loc 1 6/25/57-2 Collection on back northeast slope at top of P.King Upper Gaptank conglo. unit. loc 2 6/25/57-3 10' above Collection 2 - 6' or 8' of brownish weathering nodular limestone with interbedded yellowish shale-beds above are sandy (brownish- red). loc 3 6/25/57-4 about 80' above Collection 3 in what we believe is P.King's (this maybe his #2 limestone however). This is #2! light gray to white limestone with occasional light yellow patches. loc 4 6/25/57-5 near top of P.King's #3 limestone- In one of many gray limestone shell cochinas. This slope has some loose fragments on it which are included in collections. loc 6 6/25/57-6 10' to 15' below base of P.King's #4 Gaptank limestone - in a brown and gray weathering limestone. PG. 11 loc 7 6/25/57-7 Collection taken at base of what we believed is P.King's #5 Gaptank limestone. Drove C.O. Dunbar to Monahans to get Santa Fe for Dallas. C.O.D. seemed pretty convinced that the Gaptank is Canyon in age and not Cisco. Suggested that Uddenites might be a Cisco equivalent and he said yes that was what the fusulines pointed to. He didn't know whether the #2 limestone of King's might not also be Cisco also- The problem of the conglomerate pebbles in limestones came up again. This is a good point-Ref. to Australian paper might be good here.
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C.O.D. wants more collection from the upper Gaptank in type locality. Also a close study of the Wolfcamp and Uddenites zone in that region. PG. 12 6/26/57-1 Wolfcamp Hills- east end. Studied the "Dolomite" sequence at east end of the hills- The eastern most ridge is composed of limestone, the dolomite if present is limited to one or two narrow bands. The limestone is a more or less typical biohermal deposits, very large amounts of crinoidal debris and brachiopod shells, a few echinoid spines. Fusulines are few and are rather rare over in what appears to be pockets. Collection 6/26/57-1 is from a smooth weathering limestone band about 8" thick within the upper 2' off the massive face forming limestone, This is over lain by about 2' of unevenly bedded limestone and dolomite. The dip of the massive limestone and the unevenly bedded layers is S70E. Much of the slope to the SE of this narrow ridge appears to be rotated and slumped. The Uddenites beds are exposed. Collection 6/26/57/2 and 3 {note: illustration: bed 1: bed 2: 15' bed 3: 7' bed 4: 4'; Collection 6/26/57/2 bed 5: 9'; 6/26/57/3} PG. 13 This collection (2) is from the 2nd limestone highland from the eastern end of the Hills. The pocket from which these fusulines came is rather thin but of considerable horizontal extend. The stratigraphic interval between 1 and 2 appears to be only about 12' above collection 6/26/57-1, but the relationships are obscured by discontinuous bedding and rubble of these 2 biohermal masses. 6/26/57/3- From the highest portion of the 2nd bioherm on the east end of the Wolfcamp Hills. This collection is about 12' to 15' stratigraphically higher than (2). 6/26/57-4 west side of 2nd biohermal reef. {note: illustration followed} PG. 14 6/26/57/5 - Collection is from uppermost limestone ledge in what will be tentatively called the Uddenites Member, just west of the 2nd biohermal high. {note: illustration: 6/26/57/5 - Brown-red even surface; Brown shale.} 6/26/57/6 - This is collection from a fusuline horizon in brown-yellow weathering band at the base of the apparent upper Uddenites limestone bioherm (near the middle of the eastern sector in a wind gap.) 6/26/57/7 - Collection from Uddenites zone, 200 yards south of western end of disembarkment at east end of Wolfcamp Hills. The #2 limestone bioherm of King
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has beds dipping near east at this point and many blocks of this limestone have slipped down to cover the contact. This Uddenities bed is high in the zone and is a gray nodular limestone with interbedded brown and rust weathering siltstone. The calcite in the original rock has been recrystallized, probably as a result of the post-deposition PG. 15 feature at this end of the hills, lowering the eastern end. 6/26/57/8 - Collection from brown weathering brachiopod and fusuline coquina limestone, about 25 feet stratigraphically below 6/26/57/7. {note: illustration: bed 1: 3'; 6/26/57/8 bed 2: 15'; gray shale bed 3: 1'; Brown ironstone bed 4: 10'; Shale? gray bed 5: 2.5'; 6/26/57/7} The east of the Hills are going to present problems in covered intervals and erratic discontinuous deposition. PG. 16 6/27/57 This was one hell of a hot day. Section 25 Wolfcamp hills - Measured Section-1 Sec 25 S15E° to water windmill at Neal (Taylor) Ranch S85E° to water windmill at tank east of Ranch Gaptank 1) Covered below 2) (uneven 6-8" beds). Limestone, weathers gray to yellow-brown, a shell hash of brachiopod and fusuline frags; 5.5'; Collection 6/27/57/1 (dip 16°) 3) Covered, probably shale which weathers gray brown, 37' 4) Limestone, gray to yellow weathering, lower portion (2') 3-4" nodular beds, upper portion in uneven beds 2-4' thick. Thin bands of interbedded brown shale - 17', organic fragment. Collection 6/27/57/2, Top Gaptank. 5) Covered - 57' probably gray shale with a few rusty yellowed? sand-siltstone layers, no definite bedding could be distorted. 6) Limestone, rusty weathering, Crinoidal fragments are dominant, some pockets of fusulines are present - 8'. The upper portion of this layer has black limestone pebbles in it, but have no fossils. Collection 6/27/57/3 - one block which contained a good fusuline fauna may be from higher in the section. PG. 17 7) Covered - probably shale 52' 8) Limestone gray, weathers light brown, lower 11' are rubbly becoming better bedded into undulating 3-4" layers: Upper 13' massive in 3-4' beds, biohermal limestone. The shell fragments are dominantly brachiopod and crinoids, total 24', Collection 6/27/57/4.
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9) Covered, 5', probably a weak limestone. 10) Limestone brown weathering, slightly sandy 7', Collection 6/27/57/5. 11) Limestone gray to brown weathering 5-60'. (note: illustration: bed 1: 6/27/57/4 bed 2: 5'; 6/27/57/5 bed 3: 6/26/57/5 total height 60') The upper surface of #11 unit has a 1/2" limonite stain on a relatively recent exposed surface. {note: illustration: Reef 1: Reef 2 what I believe is probably equivalent to P. King Bed 2.} PG. 18 The formation of Reef 1 precedes that of Reef 2 and the debris from Reef 1 sloped toward the southeast. The relations are not completely clear but the debris from Reef 2 appear to rest on the truncated edges of Reef 1 debris, suggesting that Reef 1 had a greater extent to the northeast but was removed before Reef 2 came into existence. Top of Uddenites 12) Covered 27' probably soft limestone 13) Limestone gray weathering, a biohermal hash. #2 limestone? 17', in 4-5' massive beds 14) Limestone nodular, dark gray, weathers to white. 5-25'. 15) Calcarenite, yellow weathering- Caps 14 but intertongues with it {note: illustration: bed 1: 13 bed 2: 14 bed 3: 15; 7' SE} 16) Limestone yellow-buff weathering - 20 feet, collection 6/26/57/4 is from this interval-- Top of Ridge - PG. 19 Section 24 Section II about 200 yards southwest of section I. 1) Shale, dark brown, bottom of interval not seen, top not seen, estimate 100- 125' thick. Collection 6/27/57/6. [Gaptank shale is considerably thicker here than at type section?] 2) Limestone, dark gray, limestone rubble at base 8', massive limestone ledge 3' (Collection - 6/27/57/7) at 33' above base of 1st ledge - Collection 6/27/57/8 (24- 2B), this unit became progressively more shaly in the upper part. Total thickness of this unit is 74'. 3) Limestone, gray; brownish-yellow weathering-indistinct nodular bedding in lower 8' of this unit. Collection 6/27/57/9 at base- 33' massive limestone with one
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2' band of nodular limestone about midway in unit. Total thickness 41'. The upper part weathers gray on top. - Top of Gaptank - Base of Uddenites 4) Covered 12', probably brown shale. 5) Limestone, light gray with interbedded brown siltstone - Crinoidal, dark. 5' occasional brach. fragments. PG. 20 6) Covered - 9', probably gray shale and a few brown siltstone bands 7) Limestone, brown weathering, bedding 6", uneven surfaces, Crinoid, brachiopods and a few fusulines. Collection 6/27/57/10 (24-7) 8'. 8) Covered - 12' probably lime nodulars in a clay or silt, some brown colors. 9) Limestone gray, massive a) fusuline and brach coquina in a 6" band at base, Collection 6/27/57/11 (same horizons as 6/26/57/6). b) Massive limestone ledges 4-6' thick. These form the dip slope and seem to be about 10' below what I believe is P.King's limestone #2 bed. 12' thick (?) PG. 21 In the afternoon of 6/27/56, I drove northeast from the Wolfcamp hills to a tank (about 1.5 miles). From there I walked slight west of north to the low outliers of the Wolfcamp and Hess as mapped by P.King. I found silt and sandstones with even bedding exposed in a gully. They would suggest that the conglo. Hess at Wolfcamp Hills is only a local bed or lense. The sandstones are medium lamellae- 1/8" to 1/16" and have abundant tube (or fecal castings) of worms - one I measured was 5" long, 1/4' in diameter and near straight. - About 2' above this silt and sandstone sequence in the rubbly part of the limestone. I made Collection 6/27/57/12. It looks like what C.O.D. said Schubertellia Kingi would look. - 4' above collection 6/27/57/12, I found a brown shale- it had a few streaks of red-brown at the top and some gray in patches- Collect 6/27/57/13 from shale. PG. 22 At this time I'm not too sure of the data, but the deal about shifting and eroding reefs maybe a partial answer to the big picture. Perhaps in well logs we could get the needed 3D perspective on the facies shifts. After briefly looking at the lower Hess, I wonder at what silt, sandstones and cemented siltstones, with a few interbedded limestones might mean with relation to the cyclic Wolfcamp and the irregular and peculiar Uddenities zone. The phases of the biohermal growth in the Wolfcamp must have had other types of deposits elsewhere - could they not be represented in either the Uddenities facies (no because of fossils?) or the lower Hess (which is not well known faunally). The Hess section I saw in the afternoon needs to be restudied in greater detail. The massive cliff former in the hill is probably all Hess, but King reports some Wolfcamp and so the face of the hill needs to be studied.
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PG. 23 6/28/57 Section 23 Near Center of WCHs Section III in a line N30W of Taylor (Neal) Ranch 1) Upper Gaptank limestone - same unit as 3 in section II. Here it is less massive, about 8', with the middle nodular zone of unit 3 in Section II thickening up to at least 10', about 12' more is covered and it looks as if the lower massive zone of unit 3 section II is either missing or is nodular here. The upper 2-3' is a nodular limestone in 6-8" layers - becomes sandy. {note: illustration: bed 3: 13' bed 5: covered-12' bed 6: 10' bed 7: 8' to about 5' bed 8: 3'; Collection 6/28/57/1 (23-1) Top of Gaptank bed 9: covered} PG. 24 2) 34' covered - probably a gray shale - 3) Limestone, brown weathering, gray on fresh surface- This is an organic fragmental rock of brachiopod and a few coral frags. The lower bedding surface of this unit contained pockets of fusulines. Collection 6/28/57/2; 3'. 4) Covered internal - 23'. 5) Limestone yellow brown weathering, in beds 4-8", Crinoidal and fusuline coquina here, 50' to the west of the unit becomes massive and composed only of crinoidal fragments. Collection 6/28/57/3 is from base of this unit. Collection 6/28/57/4 taken 20' above base of this unit. The upper part of this unit became massive and is probably a bioherm. It tails off in both east and west directions into thin beds at the top of the western bioherm and thin beds at the base of the eastern bioherm, 33'. 6) Covered - 8' probably gray shale- Heightens to 12" but this depends whether it is between bioherms or at the top of one. PG. 25 7) Limestone, gray weathering, I take this to be the base of P.King's #2 limestone. This is a fine grained calcarenite at this point. The 2 feet of rubbly material below the base of the unit has a fusuline fauna (Collection 6/28/57/5) 4' thickness of unit. {note: illustration: bed 1: 6/23/57/1 bed 2: covered-34' bed 3: 3'; 6/28/57/2 bed 4: covered-23'; 6/28/57/3 (23-5A) bed 5: 33'; 6/28/57/4 (23-5B)
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bed 6: covered-8' bed 7: 6'; 6/28/57/5 (23-7)} PG. 26 Collection 6/28/57/6 from a brown weathering biohermal limestone in the Uddenities zone. This is approximately midway between the base of P.King's #2 limestone and the top of the Gaptank limestone- The Uddenites zone is badly covered here- This section is in line with the road down to the Ranch House S55°E, I estimate the thickness to be 85-95'- The outcrop from which collection 6/28/57/6 is about 8'. Afternoon- West of Main Hill {note: illustration followed} PG. 27 The outward appearance of this is quite misleading. The Gaptank limestone forms an anticlinal structure under the western bioherm of the main #2 ledge- The Uddenites zone and a part of the biohermal reef have slipped as a unit down one of the lower Uddenites shale bedding planes. The mass now rests in a structural valley of the Gaptank fm. The eastern side has moved the furthest with about 175' of displacement, the western end is more or less hinged about a point. Collection 6/28/57/7- about 6' below top of Gaptank fm - east side of Geologists Canyon- On the east side of Geologists Canyon, the “window” which C.O.D. pointed out on the first day is most confusing. I have some doubts as to whether it really is a “window” structure. The Gaptank does some fancy folding at this locality and it seems that the Uddenities zone is missing and the #2 limestone of King sits directly on Gaptank limestone. PG. 28 The Uddenites zones if present is only a foot or so thick, but probably is represented by little more than an erosional bedding plane. The fossils present are dominantly crinoids and a few brachiopods and are now a red chert or silica. This area is quite important and it will pay to study the fauna as carefully as possible to determine age relationships. The dips and questionable faults also may have some importance on the regional structure of the fate Penn. 6/29/57 - Drove to Alpine and got a haircut and the brakes tightened on the car. Did some banking for Mr. Fallis also. Sent off 2 bags of rock specimens to Peabody Museum on this date also. Railway Express-COD-100lbs. total. PG. 29 6/30/57 Section 22 Geologists Canyon-Section IV
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Collection 6/30/57/1- P.King's gray limestone (#2 bed) in creek floor. Covered below. 1) Limestone, gray weathering 6"-3' beds, most crinoidal fragments and some other organic fragmental matter. 31'. The upper portions of this unit have progressively large limestone boulders in them, most of the upper 6-7' is composed of limestone cobbles 3" in diameter in a limestone matrix. The upper most foot loses the large limestone cobbles - The few pebbles found on the upper bedding surface are about 1" in diameter. (6/30/57/1 is from the lower 3' of this unit). Collection 6/30/57/2 is from upper 3' of this unit. 2) 8' covered-probably gray shale. Collection 7/1/57/10. 3) Limestone, conglomerate. 1/2" to 2" diameter pebbles, well rounded, little if any chert pebbles - some crinoid stems, a productidae - brown-yellow weathering. Collection 6/30/57/3. 4'. PG. 30 4) Covered 7' black to bluish shale in lower part. 5) Limestone, conglomerate yellow-brown weathering, upper 1' is sandy and organic fragmental. Flat bedding plane on top. Bryozoans, fusulines, crinoids common on upper surface. Collection 6/30/57/4, 3.5 feet. 6) Covered, 44' one or two 4-6" brown weathering sandstones are probably interbedded in a shale (gray?). 7) Limestone, conglomerate and rubble at base grading upward into organic fragmental and finally a sand layer (well laminated) in the upper most 3-4". There is apparently a shale parting between the rubble-conglomerate portion and the organic fragmental-sand portion. Typical flat top bedding plane. (6 feet +- ?). PG. 31 {note: illustration: bed ?: covered bed 7: Collection 6/30/57/5 and 6/30/57/6 (shale parting) bed 8: 6/30/57/7 bed 9: 6/30/57/8 and 6/30/57/9 and 7/1/57/9} 8) 2' - of which the lower 1'8" is a rubble of crinoid parts - upper 3" fine grained, laminated sandstone (CaCO3 + much silicification) - a 1" shale parting separates this litho. 9) a.) shale grey-grading into crinoid coquina and 1" diameter pebble which forms a rubble 2.5'. b.) Repetitions of 9a 1.5' followed by shale parting 1". c.) Fine coquina grading upward into a coarse ss, laminated with flat upper surface 2'. PG. 32 10) Covered 30' - brown to gray shales probably 11) Limestone, orange-brown weathering - another cycle like unit 5 or 7. 4', Collection 6/30/57/10 in top portion of unit 11.
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12) Covered 13' b) then a 4" brown ss; fine crinoid sizes in ss. c) 10' covered 13) Orange-brown calcarenite - fine grained planar upper surface - no rubbly 2nd layer observed {note: illustration: bed 1: 4"-6", lamillar shelly zone bed 2: 2"-3", reworked shell zone bed 3: 3", fine ss lamillar Top of (13); 6/30/57/12} 14) Covered 7'. 15) Limestone, brown-yellow weathering irregular bedding, but with 1" top zone of fine ss nearly planar. 6". PG. 33 {note: illustration: bed 10: 4" ss (Cal.; 7/1/57/8 bed 11: 6/30/57/10 bed 12: 7/1/57/11 and 6/30/57/11 bed 13: 6/30/57/12 bed 13: bed 14: 7' bed 15: 3'; 6/30/57/13 bed 16: (16a), 5" (16b), 1' (16c), 2'; 7/1/57/7 (16d), 1.5'; 6/30/57/14} PG. 34 16) a) 3' gray shale b) 5" brown calcarenite bed c) 1' gray shale d) 2" brown calcarenite bed e) 2' gray shale f) 1.5' calcarenite sandstone This is a typical top sand and rubble limestone 17) Covered - 25' gray shale? 18) Limestone, the typical planar top surface and shell coquina below - 2' total. Collection 6/30/57/15. 19) Cover 7' Shale? 20) Limestone with some chert pebbles - brown weathering and not so yellowish as most: A conglomerate (pebble) at base of this is Collection 6/30/57/16 (6") The finer grained, sand (calcarenite) is Collection 6/30/57/14 (4") PG. 35 {note: illustration:
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bed 16: bed 17: 6" to 1'; 7/1/57/6 bed 18: 6/30/57/15 bed 19: 7/1/57/5 bed 20: 6/30/57/16 bed 21: 6/30/57/17 and 7/1/57/4 and 7/1/57/2 bed 22: 6/30/57/18 bed 23: bed 24: 6/30/57/19} PG. 36 25) a) Covered 16' b) brown ss much like 12b, with small crinoidal debris c) shale 12', with one 3" brown ss band like 20. 26) Limestone brown weathering, shale beneath- 1.5', sample 6/30/57/20 27) Shale, covered in part, 3' 28) Limestone orange-brown, few fossils 1.5' 29) Shale, yellow to orange with a few siltstone layers - 22'. Collection 6/30/57/21 (a+b) 2 sacks. Brown weathering limestone-sand near base. 30) Covered 11' probably more of 29 shale, +- 266'. 31) Hess Conglomerate. continued, bk2p PG. 37 {note: illustration: bed 24: bed 25: a) 7/1/57/3 b) c) 7/1/57/2 bed 26: 6/30/57/20 bed 27: bed 28: bed 29: 7/1/57/1 a)+b) 6/30/57/21} PG. 38 7/1/57 Took shale sample from Section IV 7/1/57/1 to 7/1/57/11 as marked on Section IV 7/1/57/12 in lower 20' of Basal Hess Conglomerate in creek bed of Geol Canyon. These are cobbles and boulders for use in determining source. 7/1/57/13 Sample of conglomerate Hess, upper 10'. The Hess Conglomerate is about 35' to 40' thick here. PG. 39 7/2/57
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Mr. Jarvis and his assistant Joe? went into field with me. Looked over lower section on West flank of WCHs. Mr. Jarvis spotted a fault? in west end of WCHs better check it because it looks as if #4 in drop to Uddenites Saddle. {note: illustration: bed 1: covered bed 2: 7/2/57/2; 27' bed 3: 3'; 7/2/57/1 bed 4: 11'; Uddenities zone bed 5: 5'; King's gray #2 limestone bed 6: 1.5' bed 7: 2' bed 8: 1.5'} PG. 40 CR's Section 20 (GSA M.88) Section V West end of the WCHs proper - measured N20W from outlier [about 300 yards west of King's Sec 24]. Below covered by out wash - Uddenites zone probably. 1) Limestone conglomerate, with crinoid and brach frags., conglomerate cobbles 1' to 4" diameter. 16', gray outcrop - top surface is near flat, has an inch zone weathered brown. Many of the crinoid stems are relatively unbroken and probably have not had a great deal of erosional transport. 2) Covered, 25' - seems to be an interval of gray shale and brown weathering calcarenite. 3) Calcarenite - Brown weathering, lower surfaces appears to be a disgested ss [burrowed]. The upper surfaces are finely laminated - 4-6" beds of ss with interbedded silts and clays, 5'. 4) Shale, blue-gray in part covered 12'. 5) Limestone, similar to #1 below, pebbles are 1/2" in diameter however; Near top is a good fusuline zone - this horizon divides vertically to the west - the upper part forming King's bed "4", 16'. PG. 41 {note: illustration: bed 1: 16'; 7/3/57/1 bed 2: 25' bed 3: 5' bed 4: 12' bed 5: 16'; 7/3/57/2; Top of King's #2 (gray) limestone(?) bed 6: 163'} 6) Covered 163' - How many beds are covered here is only guesswork - The value of this interval is of comparative proposes only. 7) Limestone, massive gray weathering, a shell hash which shows very little transportation. Coral, (long slender tetracorals), bryozoans, isolated fusulines, brachiopods, crinoid stems. lower 18' massive - upper 5' in 6" to 1' beds. 7/3/57/3 total 23'.
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8) Covered, 21' - shale? 9) Limestone, blocky - yellow-brown weathering, 6" to 1' beds, 2.5' to 3'? - Can't see any rubble base, top is planar, but lacks lamella upper 2' or 3'. Shell hash. PG. 42 {note: illustration: bed 6: 163' bed 7: 23'; 7/3/57/3 bed 8: 21' bed 9: 2.5'; 7/3/57/4 bed 10: 2' bed 11: 6/3/57/5 bed 12: bed 13: bed 14: 7/3/57/7} 10) Covered 2' 11) Limestone, same as 9, 8-12" 12) a) shale ? 6" to 1' b) rubbly, conglomerative (1/2" to 1" pebbles) organic frag. Limestone 2' (silicified fossils common) c) Limestone, coarse size organic frag. even top bedding surface 2'. The beds above 12 form irregular steps on the dip slope to the NNW. Biohermal deposits cause the irregularity in the 6" to 2' beds - 15' to 20' of strike on the dip slope of this ridge which are above bed 12 and not covered by alluvium. PG. 43 Fault strikes N15W - 25' strat displacement east apparently lowered. This fault is 100 yards +- east of section 5. This afternoon I tried to traced bed 11, section IV around to section V. Bed 11 is eroded away about in line with place where the lower part of section gets mixed up at the first turn in Geol. Canyon. The upper surface of bed 11 is nearly completely covered with fusulines - The next lower limestone coquina in Section IV, bed 9, I don't believe has this great population of fusulines. After losing bed 11, I drop down to what I believe is bed 9, at least the stratigraphic interval is about right. Then to bed 8? back to 9? then a biohermal limestone, then a crinoidal limestone, finally to a limestone with a reasonable number of fusulines 11? About 300 yards from where I first lost 11. If this bed is #11 of section IV then it is about 15' to 20' higher with 2 additional limestones in between. Perhaps several more. (ie, a chert separating 2 from vuggy zones, capped by a limestone). 13) Covered 4' 14) Limestone, brown-yellow weathering, silicified fusulines and gastropods, some echinoid? spines. PG. 44
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This unit 14 is what I believe is equivalent in lithologic connection to bed 11, section IV. PG. 45 7/3/57 Morning went to Alpine to see about some photographs; SCS didn't have very good ones, so sent for U.S.G.S. photos. Sampled from Section V 7/3/57/8 - a rock sample from about 100 yards east of section V, from the third unit: at this point unit 3 is dipping 26° S45W. It is truncated by unit 5 which is dipping about 10° N45W. 7/3/57/9 - from Uddenites zone west side of Geologist's Canyon, loose specimens. I believe the gonatities are fairly high, pelicypods also. 7/3/57/10 - from top of #2 limestone outlier - on dip slope. 7/3/57/11 - from top of a limestone in Geol. Canyon. The question is if this is a Gaptank limestone then it would appear the #2 gray member of King's is not present here as much more then rubble at the base of his #4 bed. This is the first limestone going up stream after the creek makes the major swing to the east. PG. 46 The slope on the rather flat top of the Gray Limestone outlier lines up pretty well with the reefy beds across the Canyon. If there is a fault zone in the lower portion of Geologist's Creek it can't be very great. I personally believe any discordance can be explained as slippage in the shale (Uddenites) zone carrying the Gray Limestone member down. This seems to be the result of a syncline in the upper gaptank beds which in this and the case of p. 26 apparently control the placement of streams. The gray limestone may either thin to the west, or the unit may change lithology and add shale between 2 limestone horizons, paleo will need to be checked. If the #1 bed of Section V is Gaptank and the silty sand would fit nicely as the Uddenites zone. It would seem from the top of the Gray Limestone outlier that bed 4 maintains as fairly constant interval with bed 5 of Section 5. I would put this at about 10-12' or just about the displacement of the little N-S fault. PG. 47 If the fault up Geologist's Canyon is for real, the collection from 7/3/57/11 should be Gaptank; I suspect however it will be found to be Wolfcampian. If it is Gaptank it can be easily explained as a bed truncated by the reefy beds of the #2 gray limestone above and then by the #4 bed of King near the creek beds. At this time it seems significant that the large central part of reefs are contemporaneous and are on or near the top of a Gaptank anticline. The Uddenites zones under the outlier suggests it to could be an anticlinal or at least a high area. The fossils I found today in the Uddenites zone indicate near shore deposition. The wood in all probably is too cemented to have been carried very far to sea,
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the pelcypods are small but of a mud burrowing type judging by the elongate siphonal ends of the interval casts. The gonitites may suggest normal marine salinity but this point will require further checking. The question of structural warping of the limestone in the outlier of King's Gray Limestone PG. 48 member, I believe is an illusion. I think that there were two reef heads which filled the area between them by debris from lenticular beds. The nearly flat upper surface with 2 or 3 feet or more beds extending nearby the whole length of the outlier would further suggest this. The collection of fusulines (7/3/57/10) I believe indicate slightly less turbid water (deeper?) giving these shells and smaller shell frags a chance to accumulate in well bedded strata. Pictures 4 and 5 are of the area of the smaller Gaptank anticline and the slumped #2 gray limestone. Pictures 6 and 7 are of the lower part of the western W.C. fans in the Hills proper. July 4, 1957 - Holiday in Marathon! PG. 49 7/5/57 Section 21 Section VI - about halfway between section V and IV. 1) Limestone gray, massive in 3 to 5' beds, conglomerative on the upper surface, but only slightly. Base of unit not observed. 2) Covered 6' - stream bed. 3) Limestone, yellow-brown weathering, organic frag. (crinoid fusuline) medium size quartz sand on upper surface, well rounded, but not frosted, 2', upper surface is flat. 7/5/57/1 4) Covered 16' - probably a shale interval with at least one perhaps more nodular limestone rubble beds. 5) Limestone, yellow-brown weathering, gray fresh, organic frag. (fusulines, crinoids) replacement quartz in geodes, quartzsand upper surface. The quartz sand seems to have been washed across the limestone and some quartz stuck to the limestone surface - fusulines are bedded in this ss layer. 1'. PG. 50 6) Covered 5', probably gray shale and limestone rubble. 7) Limestone, brown-gray on fresh surface, orange-brown weathering shell hash of crinoids, fusulines, bryozoans. Progressively finer grained near top. Upper surface is flat. 1'. 7/5/57/2. 8) Shale, black to blue, slightly silty, has slight fetid odor. 35', brown and variate silt zones 1" occasionally - (bentonite?). {note: illustration:
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bed 3: 7/5/57/1 bed 7: 7/5/57/2 bed 8: 7/5/57/3; 7/5/57/4; 7/5/57/5} PG. 51 9) Covered, 53'. 10) Limestone, yellow-brown weathering, (gray fresh) organic frag. (crinoid) - I'm not sure this unit is not slumped down from above. 3'. 11) Covered, probably shale in great part. A lot of limestone rubble in upper part - 37'. 12) Calcarenite, brown-yellow weathering; some sand (quartz) and upper surface loaded with fusulines, but seem restricted to upper 1". 2.5'. 13) Limestone, rubble for most part, pretty badly covered and it is possible that there are several shale intervals. 26'. 14) Limestone, a) Calcarenite, brown-yellow weathering; medium sand size through out 2.5 to 3.5 feet; flat top. b) shale parting 2" to 3", gray shale c) Limestone, conglomerate at base grading up to coarse sand sizes, organic frag. Crinoids, brachiopods, corals, bryozoans, 5.5'. PG. 52 {note: illustration: bed 16: 7/5/57/9 bed 18: 7/5/57/10 bed 19: 7/5/57/11 bed 22: 7/5/57/12 bed 25: 7/5/57/13 bed 26: 7/9/57/3 bed 27: 7/5/57/14 bed 28: 7/5/57/15 bed 13: 7/5/57/6 bed 14: 7/5/57/7 bed 15: 7/5/57/8; 9/27/57/3} PG. 53 15) Biohermal nodule - lower few inches maybe shaly and then rubbly limestone, great part is limestone, gray, (weathering - yellow-buff). Corals, brachs, sponges(?), fusulines. 10'. 16) Covered 14' on dip slope of 15+14. 14 (10/99 this seems = 12' to thin). 17) Limestone, fine pebble conglomerate, organic frag. of which fusulines seem to dominate, bryozoan 3', finer grained near top, flat upper surface.
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18) a) covered 4', probably gray shale b) 4" brown weathering calcarenite and sand (quartz) c) gray shale 6' d) 2" orange-brown silty calcarenite e) 6' gray shale f) 3" bed like b. g) covered 7', gray shale probably 19) Limestone, orange-brown weathering conglomerate (limestone) in part, pebble to coarse sand in top 6", more yellow and rubbly near bottom 3'. Organic fragmental; quartz sand on upper flat surface, scattered fusulines also. PG. 54 20) Covered 10' (shale probably) 21) 4" to 8" brown(orangish) calcarenite with quartz 22) 5' covered (shale probably) 23) Limestone, calcarenite medium to fine, progressively to top. The upper 5" are well laminated, flat top, 1'. 24) a) Shale, grayish-brown 3'. b) 1" brown(reddish) calcarenite and siltstone - well laminated, very fine quartz sand also. 25) a) shale, gray 5'. b) 4" calcarenite - some quartz very fine to fine grained 26) a) Shale, gray 4.5'. b) 6"; like 25b 27) Covered - 30' probably shale and at least 2 calcarenite beds. PG. 55 28) Calcarenite, rubbly in lower 1.5', organic frags; become progressively better laminated in upper 6", flat top surface. 2', some quartz very fine sand size on top surface. 29) Covered 41', several calcarenites with gray shale probably. 30) calcarenite, organic frag. (brachs, fusulines, crinoids) 10" flat surface is not striking on this bed; wood fragments. Collection 7/5/57/16. 31) Covered 18' - probably gray shale. 32) Marl, silt and clay in matrix and as coarse sand fractions. Has a well laminated upper 2" with flat top. Sort of a transition between influence of source over environment of deposition 21'. Collection 7/5/57/17. 33) Covered 31'. 34) "Hess" Conglomerate 30'+. PG. 56 7/6/57 Section 19 Section 7 - low hills to west of Wolfcamp Hill. The line of section runs due North.
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Covered below 1) Calcarenite, pebbles 1.5" to 2" max, Calcarenite sand matrix and Calcareous cement. Fossiliferous (Crinoids and fusulines), bedding 1' to 1.5'. Flat top 4.5' gray fresh, light yellow-brown weathering. 2) Covered 5.5' probably shale or weakly cemented rubble. 3) Calcarenite, with a few small pebble, fusulines bryozoans and crinoids common. Quartz sands in upper part, 18", flat top. Yellowish-brown weathering. 4) Covered 17', probably shale and 1 or 2 calcarenite beds (less than 4-6" thick). 5) Calcarenite, brown weathering, some quartz sand 8" thick. PG. 57 {note: illustration: bed 1: 7/657/1 bed 9: 7/6/57/2; 7/6/57/3, loose} 6) Calcarenite, gray-brown weathering, shell hash, fusulines, crinoids and brachs. Lower part of unit is a shale which grades into a limestone rubble, then into a well sorted frag. limestone. Upper surface is planed flat. Total 5'. 7) Covered 8' - gray shale and some silty calcarenite. 8) Calcarenite - well graded medium sand, a few fusulines (small) and stem joints of crinoids - several beds in a 4' interval. 9) Covered 76'. The lower 20 feet is probably mostly blue-gray shale. The upper 15' probably mostly limestone rubble. PG. 58 10) Calcarenite, 2" diameter pebbles, some crinoids and bryozoans a few fusulines, brown weathering , gray on fresh surface 4'. 11) a) shale break - 1'. b) 4-6" well sorted Calcarenite, laminated upper 2", flat upper surface. Total 1.5'. 12) Covered 24' - probably shale (gray) - 1 or more brown calcarenites maybe present. 13) Calcarenite, brown weathering, lower part a shell hash, a shale break and then the well sorted 4-8" calcarenite laminated bed. Total for unit 4.5'. 14) Calcarenite, (limestone rubble) [The main difference between the "so called" rubble and what I've been calling limestone conglomerate or calcarenite seems to be the cementing material. In the "rubbles" the cement is clay and it weathers to a yellow or yellow-brown] gray and mottled brown weathering. 18' in 6-18" beds. PG. 59 {note: illustration: bed 14: 7/6/57/4 bed 19: 7/6/57/5}
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15) Calcarenite, brown weathering, frags in lower part fine pebble to coarse sand sizes, progressively finer toward top - medium sand size at top. No apparent lamination. 3.5'. 16) Same as 14, rubble, 5.5'. 17) 3" shale break. 1.5' of calcarenite like 15. 18) Like 14, rubble, 4'. 19) Like 10, conglomerate, 1.5' but pebbles 1-1.5" diameter. PG. 60 20) Mostly covered, 7'; at least 3,4" brown weathering calcarenites, the rest is probably gray shale. 21) Like 19, conglomerate, the upper .5' is well laminated, has some black chert in seams 11 to bedding, 1.5'. 22) Calcarenites and gray shale - 3, 6" to 1' calcarenites, brown weathering. Crinoidal and fusulines fragments, 4 gray shales 1' to 1.5'. Total 11'. 23) Limestone, gray weathering, biohermal reef. 17', upper part is crudely bedded in 2' units lower part is "rubble". 24) a) 2.5' gray shale b) 0.5' calcarenite, brown weathering (like 15) 25) like 24 a) 1.5' shale b) 1' calcarenite 26) like 24 a) 6" shale b) 6" to 2" thins to east, calcarenites PG. 61 {note: illustration: bed 22: 7/6/57/6 bed 30: 7/6/57/7} 27) as 24 a) 1.5' shale b) 8" to 4" calcarenite 28) Calcarenite - lower 1' rubble as 14, but 21' as 15. calcarenite 29) as 24 a) 1.5' shale b) 2.5' calcarenite 30) as 24 a) 4' shale b) 6" calcarenite 31) as 24 a) 2' shale b) 2.5' calcarenite PG. 62 32) Shale gray, 5.5', 2 calcarenite bands, 2" to 4" thick, fine grained. 33) as 15, 2.5' calcarenite 34) a) shale gray 4" to 8" b) gray limestone, shell breccia, calcarenite 6" to 1'. 35) 6.5' - like 14 lower 5', like 15 upper 1.5'. 36) Shale gray, mostly covered [4'] <-- 14'?
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37) Calcarenite orange-brown upper surface, flat 1'. 38) Mostly covered 2, 4" calcarenite beds at 4' and 10' are exposed. 32'. 39) Calcaledite "rubble" black of gray limestone 6" diameter brown mottled zones with crinoids and fusulines in them. Beds 1' to 3', occasional evidence of the beds being well sorted and laminated at top - 2 observations. PG. 63 {note: illustration: bed 38: 7/6/57/8 bed 39: 7/6/57/9} 40) Covered 11' probably less resistant limestone rubble. 41) like 39, 26'. The calcarenite making the top bed in this sequence is well sorted and bedded, well cemented, flat top. 42) Covered 20'. <-- 40'? 43) Calcarudite, well cemented, yellow-brown, 1.5" diameter pebbles, becoming fine grained in upper 3" flat upper surface. 3.5'. 44) 16', lenticular calcarenites. These are interbedded with shales, 50 yards to west I could find only 3 or 4 relatively thin beds. PG. 64 45) Covered 64'. 46) Gray shale, some interbedded orange and brown sandy siltstone. 53' covered to a large extent. 47) "Hess" Conglomerate. 8', Calcarudite with a large number of dark chert and quartzite pebbles - 4" to 5" diameter. {note: illustration: bed 43: 7/6/57/10} PG. 65 Collection 7/6/57/12 from a yellow weathering conglomerate about 6' below bed 47 - It seems to differ from bed 47 in yellow color and that's about all. 2-3'. {note: illustration: bed 46: 7/6/57/11; 7/6/57/12} The zone of biohermal limestone, #23, seems to carry through pretty well. I believe that #23, section VII, is equivalent to #15, section VI, and to #7, section V. PG. 66 7/7/57 Big Bend Park. The first collection is from same horizon as is the John Wilson Eocene Dinosaur exhibit just before reaching park RIQs. 7/7/57/1 (This is only a few 10's of feet above the upper K contact).
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7/7/57/2 along Willow-Creek, Terlingua Quad. North 13', west 32'. This is probably Gulfian. {note: illustration: bed 1: covered bed 2: 15', marl bed 3: 3', clay bed 4: 35', massive Ss.} PG. 67 7/9/57 Section 19 cont. Wolfcamp Hills - Continuation of Section VII. 48) Shale, very silty, grades into a 6" sandy siltstone. Light yellow-brown weathering. 3'. 49) Conglomerate, fine sandy matrix, poorly cemented, 1/2" diameter pebbles - a few 2 to 4" bands of greenish-gray siltstones. 6'. Collection 7/9/57/2. 50) Conglomerate, 3" to 4" cobbles at base of a subunit. The subunits grades into a ledge forming (indurated) fine sandstone. 3 or 4 such subunits observed. Top of each subunit is rather planar. Coarse conglomerate rest right on top of this planar surface. 14'. 51) Shale and siltstone, gray to yellow-brown, 5'. 52) Sandstone, yellow-gray weathering, in 4" to 10" beds with 2" silt partings. 16'. PG. 68 {note: illustration: bed 49: 7/9/57/2 bed 53: 7/9/57/1} PG. 69 53) like #50, 0.5" to 1" pebbles, 5'. This grades laterally into 6' of gray and yellow shale and siltstone. Collection 7/9/57/1. 54) Sandstone and conglomerate 3" to 3' lenticular beds. Conglomerate 2" diameter max. Sand is mostly calcarenite, 10'. 55) Covered 6' - mostly gray to greenish gray siltstone. 56) A multicyclic (?) unit like #50, 3" cobbles 1' to 1.5' per subunit. 9', calcarenite sandstone a very fine to fine size. 57) Sandstone - very silty, and very fine sand size greenish-yellow-brown weathering, 3' rudite ledge 1/2" to 1" pebbles, 4.5'. 58) Calcaredite and calcarenite - 4" to 6" split parting 2' gray to slightly yellow- grey weathering. 59) 57' covered. PG. 70 60) Metamorphozed limestone, and some baked shale 5'.
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61) Rhyolite? sill. Top of Section cont. King Sect. 24? Collection 7/9/57/3 - from ant hill on small WC knoll, in about horizon of #25 or #26 of section VII. Collection 7/9/57/4 - dark gray limestone in slope of #2 (Gray Limestone) of King Outlier - SE flank. 1/3 of way up from gate - I doubt if it is in place. {note: illustration: bed 1: 10', 7/9/57/5 bed 2: 45', 7/9/57/4 bed 3: 60' bed 4: 25' bed 5: 45' bed 6: 20'} yellow calcaredite, has dark grey limestone cobbles, rusty fine sand and silt matrix. PG. 71 Section 26 Section 8a - 2.5 miles NE of (Taylor) Neal Ranch House lower part of section badly covered. 1) Sandstone, very fine size, yellow weathering - Tetracorals, brachiopods, sponges?, fusulines?. This bed is fairly porous and most fossils are empty molds. 1' to 2'. 2) Covered 12'. 3) Limestone, gray, shell hash, brachs, crinoids, fusuline 9'. Collection 7/9/57/6, 4" to 1' bedding. At top of unit a bed like #1 is capping. 4) Covered 29'. 5) Limestone, gray at bottom (2') <-- 7/9/57/7, 42' above are gray-brown weathering dolostone no fossils identifiable. 2" to 4' beds. 6) Covered 14'. 7) Dolostone, yellow-brown weathering. 1' to 3' beds, 12'. PG. 72 Section 8a runs up a small slope. The various angles of bedding and covered intervals between these outcrops are suggestive of some structural disturbance. Section 8b begins on what I believe is bed 7 of 8a. 8) 69' covered. 9) Sandstone, poorly undulated, very fine sand size, some silt, well sorted however, CaCO3 is common as sand grains - greenish-gray shale yellows. 36', 1" to 3" beds. 10) Limestone, nodular uneven bedding, 3" to 6" beds. Collection 7/9/57/10, 3' above base. 38' (See page 21) Collection 7/9/57/11, 15' above base. 11) Siltstone, pebbly, yellow weathering, some bands are more pebble than silt! 15' poorly cemented. 12) Siltstone with pebbles - siliceous cement 2'.
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<-- Neal Ranch Fm. <-- Gaptank Fm. (applied to #9-#12) PG. 73 Section 26 13) Shale and siltstone (10') green-gray colors, 2, 6" welded siltstone (siliceous) near top. 14) Sandstone, very fine to fine-grained, siliceous cement. 2'. 15) Shale 9' green-gray "bumpy", mostly covered. 16) Siltstone with siliceous cement, 6" to 2' beds - 2" to 6" shale on silt partings, buff colored. 11'. 17) Shale (and some siltstone), in beds 6" to 1', siliceous siltstones, in 4" layers 10'. Collection 7/9/57/12. 18) Covered 26'. 19) Siltstone, siliceous buff - [2'] 20) Limestone, yellow weathering 3' - brown blotches where there were once fossils, very silty. 21) Covered 16'. PG. 74 22) Sandstone, pinkish-brown, well and thinning laminated - calcarenite. 6". 23) Covered 30' 24) Silty, brown-orange weathering, dolostone. 4'. It was fossiliferous. 25) Covered [25' +-], above that Coarse Calcarenite. 40' or more. Brooks Ranch Mbr. Lenox Hills Fm. <--l<-- Neal Ranch Fm. PG. 75 Section 27 7/10/57 C. Brooks Ranch SW exposures. Also over the fence on to part of the Neal Ranch. The limestone cliffs on the NE part of the Neal Ranch are lithologically continuous with the interval #3 through #7 of Section 8a. The #9 unit thickens and thins but seems to be fairly continuous throughout. Section 9 (Sect. 27)(dip 7°-10°) (N) {note: illustration: bed 1: covered bed 2: 30'; several yellow-brown weathery ledges - would like to call this Uddinites zone based on color and characteristics of the sandstones; 7/10/57/4 bed 3: 15'; gray limestone - very dark brown; 7/10/57/3 bed 4: 18'; covered; some brown-red shale bed 5: 23'; biohermal and shell hash, gray; 7/10/57/2 bed 6: very fine sandstone with silt 6" greenish-gray bed 7: 34'; algal limestone bioherm, gray
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bed 8: 4'; covered bed 9: 6'; gray; 7/10/57/1} PG. 76 Section 29 Section 10 (dip 10°) (N) Covered below-float looks like bed #2 section I. 1) Limestone, organic fragmental, crinoids brachiopods weathers light gray with tinge of yellow. 2 rubble zones near base - a) 14' massive b) 3' in 1' beds c) 5' gray and yellow massive Top Gaptank 2) Covered 7' some gray-shale, probably all is! 3) Sandstone, very calcareous (grains) Fe2O3H2O acting as cement? weathers deep yellow brown. 3'. There are surfaces coated with crinoid frags. 4) Shale gray with few gray siltstones and very fine sandstone grading upward into dominant silt and sand over the shale - unit is essentially gray weathering throughout, becoming slightly yellow near top. 139'. PG. 77 {note: illustration: bed 1: 22'; 7/10/57/5 bed 2: 7'; bed 3: 7/10/57/6} 5) Sandstone fine grain, yellow-orange weathering, 3" to 8" beds, even bedding, nearly uniform size and color throughout unit. Total 53' Upper 3' are in 1' beds, paler colors than below. 6) 15' covered. PG. 78 7) Limestone, gray, rather fine shell hash. Mostly brachiopod fragments recognizable. 8'. 8) 14' covered. 9) Limestone, gray massive, shell hash, 2 beds 6' separated by 6" of limestone rubble. 12.5'. 10) Covered impart - most is a less resistant nodular limestone gray-brown weathering, brachiopod hash. 23'. 11) Limestone, gray massive biohermal 28' (_?_) 12) Covered 5'. 13) Limestone, gray, rubbly at base 2.5' fine hash. 14) Covered - 4'. {note: illustration:
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bed 13: 7/10/57/7} PG. 79 15) Calcarudite, cobbles 4" to 6" diameter, (largest); light brownish-gray weathering limestone matrix. This looks like the "Hess Conglomerate" in the Wolfcamp Hills 15' plus (eroded upper beds). Colored Picture 24 or 25 - of a "typical" (2) cyclic sequence of Wolfcamp. 1) gray-yellow shale Collection 7/10/57/8 2) silty and full of fusulines {note: 1 and 2 (2' to 3.5')} 3) limestone rubble 1' 4) calcarenite 8" 5) calcarenite 2' {note: 4 and 5 (orange-brown weathering)} This is probably not typical of the Wolfcamp Hills, but seems typical of eastern exposures on Brooks Ranch. PG. 80 Section 30 Section 11 - Near earth tank 1 mile +-, west of Brooks Ranch, begins at top of Gaptank limestone. 1) Limestone, (Gaptank) (dip 7°N) dark gray weathering, 8' massive upper part contains 1/4" to 1/2" gravels calcaredite only in upper part. 2) Covered 11'. 3) Limestone, shell hash, but not readily identifiable 1' Collection 7/1/57/9 fetid, black on fresh surface, weathers dark gray with spots of iron stain. [Coll 30-3]. 4) Sandstone, very limy, light yellow to orange weathering, 6" to 1' beds, 34'. 5) Covered, probably gray shale 27'. 6) Calcarenite, gray weathering, fine sand size, and quite a bit of siliceous silt sizes. 1" to 6" beds, irregular bedding 15'; 7/10/57/10 [Coll. 30-6]. 7) Limestone, blue-gray weathering, massive brach frags but very fine grained. 4'. PG. 81 {note: illustration: bed 3: 7/10/57/9 bed 6: 7/10/57/10 bed 8: 7/11/57/8} 8) Limestone, light gray to light brown or tan weathering. Beds 2" to 6", uneven or rubbly. Fine grained for most part, (no large frags), several intervals are covered, but seems to be less resistant limestone rubble. 23'. 9) Covered 17'.
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10) Limestone, blue-gray, sort of rubble, but almost a calcarudite. Darker "pebbles" are in a lighter matrix, but the difference seems to be one is reticular around the other, not good pebbles. 22', 1" to 8" beds 7/10/57/11. [burrowed??] [weathered??] PG. 82 {note: illustration: bed 10: 7/10/57/11 bed 13: 7/10/57/8 bed 17: 7/10/57/12 bed 19: 7/10/57/13} 11) Limestone, light gray weathering, massive, fine grained, 11'. 12) Limestone, shell hash, weathered mottled gray and brown, crinoids, bryozoans, a few brachs, 1/4" to 6" beds. A few inches of shale at the base of this unit. Top of unit has brown weathering color characteristic of the middle an upper Wolfcamp cycles. 15'. 13) Shales in lower part (5' to 7'), becoming more silty and sandy, fusulinid sandstones in upper 2' to 3', 1' shell hash. Collection 7/10/57/8 see note on picture p. 79, 18'. PG. 83 Between unit 12 and 13 slicken-side surfaces were seen cutting the down dip exposures of bed 12, no major displacement has taken place, but this seem rather to be the adjustment to a slight Post Hess warping forming a gentle syncline near the tank. 14) Calcarenite, yellow to orange-brown weathering quite quartz, rich and might be best considered as a quartz sandstone. 2.5'. 15) Cycle - a) 4' gray shale b) 1' like #4 below (at top) 16) Gray shale 9'. 17) Sandstone yellow weathering, 1' beds on less; 16' The fine sandstones have a great deal up to 40 or 50% fusulines, crinoids, gastropods, 7/10/57/12. 18) Covered, probably continuation of 17. [15'?] 19) Limestone, weathers gray to brownish-gray, shell hash, brachs, some fusulines. [12'?] 7/10/57/13. PG. 84 20) like #19, 7'. 21) Sandstone, very fine high CaCO3 4' greenish-yellow. 22) like #19, 21'; changes to dolomite along outcrop (100'). Although no Conglomerate beds were found, I believe beds 19-22 are in the same interval as the "Hess" Conglomerate of section 10. [probably a matter of pre-Hess topographic relief.]
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The absence of "Conglomerate" bed in the lower Hess in Section 8 and in Section 11 leads me to believe the conglomerate in the Wolfcamp Hills and in section 10 are local lenses and not a good mapping horizon. The light gray limestone at the approximate level of these conglomerates appear to be a fairly consistent outcropping horizon. Without the benefit of fusuline evidence I would at this time suggest the beginning of silty and fine to very fine sandy bed above the highest "cyclic" Wolfcamp in the Wolfcamp Hills seems to be a persistent unit also, although it is often obscured by talus. PG. 85 The upper beds of the Wolfcamp are apparently missing in the western portion of the Brooks Ranch as a result of erosion. The limestone cliff forming Wolfcamp units is probably equivalent to the #2 gray limestone member of King in the Hills proper. Upper Wolfcamp Cyclic deposits were observed on the Brooks Ranch (to be measured later) and also at section 11. The Gaptank limestone becomes the prominent cliff (no it doesn't) former in the low - builds east of section 11 because of thinning of the #2 gray member of King and also because of some thickening of that (gaptank) unit to the east. {note: this paragraph was crossed out} The upper Wolfcamp beds in Sect 11 are in a structural low and show evidence of being deformed slightly prior to Hess limestone deposition. PG. 86 7/11/57 Section 28 Covered below Section 12; at head of draw northwest of section 10. 1) Limestone, gray, massive beds, 3 to 20' bedding biohermal, rather fine fragments - 51'. 2) Covered 7'. 3) Limestone, gray, uneven bedding near base, more massive higher. Gray weathering. Crinoid stems and fusulines near base. 3'. 7/11/57/1. 4) 1' covered. 5) Calcarenite, yellow-brown weathering, brown-gray on fresh surface. Some fusulines and brach shell fragments - 1.5', 7/11/57/2. 6) Covered 2'. 7) Calcarenite, yellow-brown weathering some mottled grays, coral and crinoid and brachiopod fragments. [1'] 8) Covered, gray-brown shale probably, 1.5'. PG. 87 {note: illustration: Section 12: bed 3: 7/11/57/1 bed 4: 7/11/57/2 {notes beds4-7: 5.5' total}
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beds 8-11: 5' total} 9) Sandstone, fine grained, yellow to gray-brown weathering, 6" (calcareous-quartz). 10) Shale gray, mostly covered 2'. 11) Sandstone, fine grained, orange-brown weathering, calcareous-quartz. 8" to 1'. PG. 88 12) Shale, brown to gray with 1" to 3" beds of siltstone and sandstone (fine) poorly indurated. 22'. 13) Covered 23'. 14) Sandstone, brown to yellow weathering in 3" to 6" beds, gray on fresh surface. Calcite cement and some calcite grains <30 to 40%. Crossbedding 1/2" to 1" fine to very fine sand well sorted; I believe this to be either eolian or back beach, maybe a little of both. 27'. 7/11/57/3. 15) Covered 18', limestone rubble? 16) Dolostones, 45'+ brown weathering. Above are undoubted Hess beds of general position and lithology in 19 through 21 of section 8b. PG. 89 Section 28 contd {note: illustration: bed 14: 7/11/57/3} Really need to work this out on photos! PG. 90 Section 31 Section 13a - 1/4 mile east of section 11, up front of lower ridge - To top of hill 4752 Section 27 of King. 11) Limestone dark gray, (Gaptank) looks like biohermal rubble - 3" to 4" diameter blacks 5.5' massive 7/11/57/4. 12) Limestone, rubble, dark gray, in 3" beds, very uneven 1.5' 13) Limestone, like #1, upper 3' is 8" to 1' beds, lowers 9' massive, weathers to irregularly pocketed, but rather smooth masses. 7/11/57/5. 14) Sandstone, fine grained weathers orange to yellow-brown, some green color in patches. 3" to 6" beds; 3.5'. 15) Covered, but seems to be a dark red-brown shale zone - This is same color as is at top of Wolfcamp 3/4 mile west. 7/11/57/6, 7'. 16) Calcarudite - all sizes, up to about 2" diameter. Small pieces of Tensus? chert and other cherts, subangular to subround. Upper 1' organic frag. 9'. PG. 91 {note: illustration: Section 13a:
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bed 12: 7/11/57/4 bed 13: 7/11/57/5 bed 15: 7/11/57/6 bed 17: 7/11/57/7 bed 18+: Lenox Hills} 17) Mostly covered, limestone rubble, purples, grays, yellow-browns - 5" to 8" beds. 28'. 7/11/57/7. 18) Calcarudite, cobbles 6" to 10" diameter; mostly limestone cobbles, but a few large chert cobbles and quartzite also. In 3' to 6' beds - cement in limestone weathers yellowish. 45' to top of ridge. PG. 92 Collection 7/11/57/8 from the zone of #8 and #9 units in section 11. The limestone have changed to calcarudites and appear much thinner. They seem to thin rather than being entirely truncated at section 13. This collection is from a saddle on the northwest side of the Ridge Section 13 is on. Collection 7/11/57/9 from Gaptank limestone, dark gray (upper most Gaptank limestone) 2 bags, one of softer interbeds, one of dark limestone. The stream gully on Brooks ranch 1 mile west of Ranch House. Remark - It certainly isn't like P. King mapped it. PG. 93 Section 31 see King's Sect 27. 7/12/57 Section 13b - Below unit 1 of Section 13, there is an exposure of gray-brown shales and orange sandstones. Whether this is a zone in the gaptank or the illusive Uddenites zone is the major concern. The field evidence to date would suggest to me it is a zone in the Gaptank - (These are vertical distances, dip 10° to the north.) 1) Limestone, dark gray, organic fragmental, mostly brachiopods and crinoids - 25'. 2) Covered 20'. 3) Limestone, yellow weathering, dark gray fresh surface, organic fragmental - see collection 7/12/57/2, 1'. 4) Covered 12'. 5) Limestone, black to dark gray, organic hash, 1.5'. 6) Covered - 28' probably mostly of #5 lithology. PG. 94 7) Sandstone, light orange-brown weathering, much quartz; cross bedding, sizes not well sorted, probably fluvitih deposition. This unit appears to be truncated to the west by unit #8. 21'; in 6" to 3' beds. 8) Limestone, dark gray, organic fragmental very uneven lower bedding plans, 3' to 5' of relief cut into truncated edges of #7. 11'.
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9) Alteration of Calcarenites and brown gray shale, Calcarenites become very fine pebble conglomerate higher in unit; 55' to 60' interval is badly covered. 10) Covered, 40' to base of Section 13a unit #1. PG. 95 {note: illustration: Section 13b: bed 8: Collection 7/12/57/3 bed 1: 7/12/57/1 bed 3: 7/12/57/2} PG. 96 {note: illustration: Conolyn Brooks Ranch: see illustration for notes} PG. 97 Section 34 (part) Section 14, 3/8 mile west of C. Brooks Ranch House. Covered below 1) Sandstone, light orange-brown weathering. CaCO3 cement in part, a few grains of calcite 6" to 2' to 3' beds - 38'. (see unit 7 Section 13b). 2) Shale, gray to brown with 2 beds (1') like #1. 17'. 3) Limestone silty and sandy, but abundant fusulines weathers light tan or yellow. Brach shells also abundant. In 3" to 6" bed, uneven bedding surfaces. 29'. 7/11/57/4 NO! 7/28/58/1 check samples 7/12/57/4 4) Covered, 55': If other side of gully is compared, this interval is a massive calcarenite, gray weathering with indistinct 6" to 6' beds. It caps that ridge but not the one the section climbs. (Fault?) 5) Limestone, gray mottled colors, darker "pebbles?" in a lighter matrix; 1.5' to 3" beds irregular bedding planes 18'. PG. 98 6) Limestone gray massive, 44' crinoid fragments, brachiopod shells. 7) "Hess" Conglomerate about 10' above this last unit 6. This is on a dip slope so it is difficult to set the interval between the top of #6 and the "Hess" Conglomerate, but it is within the 10'. Along the front of the central segment of the Brooks Ranch Wolfcamp ridge most of the drains are the result of erosion in the zones of weaknesses caused by faulting. These faults have throws of 10' to 50'. The limestone ledges back of the ridge have several zones of slicken sides which I interpret as movement on bedding planes as the Wolfcamp limestone was arched during later. Marathon basin movement. Probably past K all though I have no direct evidence for the time of movement. The faulting perpendicular to strike cuts the Hess and
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Leonard so that it aids in draw forming there also. The remnants of K caps are apparently protected by differential movement on (cont. on page 98) PG. 99 Section 24 (see pg. 163 of book 2) Section 14 {note: illustration: Section 14: bed 3: 7/12/57/4} cont. from pg. 98 these faults and can be explained in this manner. The evidence in section 13 suggests that the Gaptank and the Wolfcamp limestones either converged and form a combined mass of limestone, or that the Wolfcamp is lacking. The study of section 14 indicates there is more to this than at first meets the eye. I believe based only on lithology that unit 3 of section 14 is the same unit as #1 of section 13a. The #1 and #2 beds of section 14 are probably the same as bed 7 of 13b. The #8 beds of 13b may PG. 100 cont. from pg. 99 however be equal to the #3 beds of section 14. The fusulines may tell us the answers, but if the middle of Section 13b is the Uddenites zone what happens to the Gaptank limestone between section 11 and section 13?; is what I've been calling Gaptank in the western part of the Brooks Ranch really King's #2 limestone member in the W.C.H.s? You know, Charlie this could be confusing. Another question is what is the red horizon of interval which some places seems to separate the massive Wolfcamp limestone (King #2?) and the "Hess" conglomerate (which is often not a calcarudite at its base). I suggest the upper dolostone in section 11 is equivalent to the conglomerate. 7/13/57 - Went to El Paso to meet John Pope (Harvard '54) (Mich. 56 MS) (Cinci. currently) and his wife. Charles Marken and Pete Roux left on the 12th for Austin, they were instructors at U.T. field camp, Leary's Ranch. PG. 101 32 7/16/57 Section 15a - 3/8 miles northeast of road into central valley on Brooks Ranch. (10° dip, N60W). Gaptank? 1) Limestone, dark brown-gray, very fine x-talline, fusulines, some beds gray to gray-tan. This exposure is one of several small isolated rubble heaps out from foot of cliff. This pile of limestone is not bedded, but appears to be more or less
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in place. If the fusulines are Gaptank in age then I believe it is safe to consider this outcrop in place. More than 5'. Collection 7/16/57/1 [Leonard Sch. crastictoria] 1-64 C.R. check sample?? 2) Covered 83'. 3) Shale, light gray (impart covered), 7 or 8-2" to 3" sand and silty sand (Quartz) bands scattered in upper half of unit; 28'. 7/16/57/2. 4) Sandstone, orange-brown weathering, medium quartz sand, with silt fragments of pebble (1/4 to 1/2" diameter) Brachiopods, crinoid stems, goniatites wood fragments. 2'. PG. 102 5) Shale, gray to bluish or greenish-gray, 4 or 5-1" very fine sandstone bands, 10'. 6) Sandstone, orange-brown weathering, fine quartz sand size with calcareous cement. A few wood fragments. The lower 1' of this unit is light green-gray weathering, sand size is the same, difference seems to be the amount of Iron Oxide with the CaCO3 cement. 8'. 7) Shale, greenish-gray, a few 1/2" of sand of siltstone horizon. (7/16/57/3) 27'. 8) Sandstone, orange-brown weathering, very fine sand size much silt --> 30% brachiopods, wood, crinoid stems, 2 to 3" beds 3'. 9) Like 7 in lower part, gradually, upwards, the lithology of unit 8 becomes dominant, beds 3" to 4" is the sandstone: 46'. 10) Sandstone, light brown weathering, (3' of gradational beds at base to this unit into the blue-gray shale at top of #11. 6" to 2' bedding: 19'. PG. 103 {note: illustration: bed 1: 7/16/57/1 bed 3: 7/16/57/2 bed 7: 7/16/57/3 bed 11: 7/16/57/6 bed 12: 7/16/57/4 bed 14: 7/16/57/5} 11) Covered 23', probably blue-gray shale with possibly one limestone bed 8' uneven nodular bedding surfaces. Fusulines, bryozoan, crinoid hash. Collection 7/16/57/6. 12) Limestone, gray weathering, massive beds, blocks weather rounded, (not angular). This unit has wavy bedding surfaces and seems to represent a fore reef accumulation of dumped debris 6" to 8" beds. 7/16/57/4. 32'. 13) Covered 8' probably same as 12. 14) Limestone, light brown weathering, cliff forms 2' to 15' beds, massive weathering as a unit along most of this ridge. 53' to top of ridge. PG. 104
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Section 15b - down dip slope and across draw and up to point which is lithologically similar and on the correct altitude to be bed #14 of Section 15a. 15) Covered 7', gray-green shale for most part. 16) Limestone, gray (light green tint) nodular, wavy bedding 7', 7/16/57/7. The upper 6" to 8" of this unit is now caliche. The caliche becomes less dominant after that. This seems to have been a horizon of higher porosity that either that above or below. 17) Calcarudite, all of about same color, probably biohermal debris deposit - 16' no fossils apparent. 3-5'+ beds - gray weathering, like 12. 18) Covered 10'. 19) Calcarenite + organic fragmental 8" to 3" beds. Crinoid stems and fusulines. 7/16/57/8, 12' weathers pink-brown to reddish brown very uneven bedding. PG. 105 {note: illustration: bed 15: 7/16/57/11 bed 16: 7/16/57/7 bed 19: 7/16/57/8 bed 21: 7/16/67/9 and 7/16/57/10} 20) Covered, 16'. 21) "Conglomerate Hess", 7/16/57/9 - a collection of cobbles from lowest exposed bed. Many shades of Limestone, dark gray or nearly black to light gray, white and black cherts, 7/16/57/10 - fusulines in with the fines of the conglomerate. About 110' thick. PG. 106 Today picture on page 96 looks like this of we can accept King's age on the #1 bed of my section 10, page 76. {note: illustration on this page} I believe the Hess Conglomerate is a number of pocket beaches. The dolomite strata probably of Wolfcamp age and exposed to suballuvial weathering. PG. 107 Section 40 7/17/57 - Allison Ranch Gaptank area - The manner in which the Gaptank limestone lens is striking. They seem to originate in the "Uddenite" zone and thicken rapidly to the east and then thin to disappearance. I wonder whether this Uddenites zone is even approximately equivalent to that of the "type" area (WCHs) Section 16, north of highway along Allison-Moore Fence - Due North. Covered below -
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1) Limestone, brown-yellow weathering, organic fragmental - Brachs, bryozoans, crinoids, mollusca, fusulines. Collection 7/17/57/1, 5.5'. 2) Covered 21'. 3) Sandstone, 70% or more Quartz, CaCO3 cement. Brown-orange weathering, medium (1/8" to 1/4") lamellae, even - not irregular; in beds 3" to 1', some beds are composed of many small shell fragments - I interpret this to be a littoral deposit, has whole shells of punctuate brachs. 7/17/57/2. [12']. PG. 108 4) Covered, (unknown), 2 or 3-6" bands of brown-orange weathering sandstones. Collection 7/17/57/3 from cut hills. 34'. 5) Limestone dark gray weathering, organic fragmental crinoids and Brachs mainly. 7/17/57/4 at 38'. 3" to 2' beds 61'. (Transfer bed?) 6) Covered, 66'. 7) Limestone, dark gray, with large amounts of orange-brown quartz sandstone in between irregular limestone masses. 8', 7/17/57/5. 8) Covered, 13'. 9) Calcarenite and ss., light gray weathering, dark gray on fresh surface 3.5', 2" to 6" beds - 7/17/57/6. 10) Covered 10'. 11) Limestone, weathers orange-brown fresh, brown-dark gray. Shell hash, fusulines, crinoids and brachs. 6" to 1' beds. [4'] 7/17/57/7. 12) Covered, 13'. PG. 109 {note: illustration: bed 9: 7/17/57/6 bed 11: 7/17/57/7 bed 15: 7/17/57/8 bed 16: 7/17/57/12 bed 1: 7/17/57/1 bed 3: 7/17/57/2 bed 4: 7/17/57/3 bed 5: 7/17/57/4 bed 7: 7/17/57/5} 13) Sandstone - orange-brown weathering, fine sand size, laminated - see color picture. 6"-8". 14) Covered, 22'. 15) Limestone, medium gray weathering, fine grain Calcarenite, many silicified brachiopods. Collection 7/1/57/8 about 4' above base - crinoids common. 6'. 16) Covered, but probably like #15 - 38' to the east becomes a gray-green shale but looks to be more than the measured 38'. 7/17/57/12. PG. 110
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17) Limestone, gray-brown weathering, platy fragments of shells, mostly [potato chip?] brachs, algal. 1' to 2' beds - overall weathering creamy - 7'. 18) Covered 21'. 19) Limestone, (calcarenite) with some quartz 1--20%, cherty or quartzite pebbles 1% or less; weathers a medium brown-gray, whitish speckles - wavy uneven bedding, 1" to 2' thick; 55'. The upper 40' become very quartzite - about 85-90% SiO2 excluding cement. Becomes poorly cemented upwards. 20) Covered, 45', probably like unit 19, see note on page 112. 8/22/58/7 and 7/17/57/9. 21) Limestone, massive, brownish-gray weathering; [Transfer bed] solutions bedding in 6" to 1' intervals, but not much "true bedding" 31'. Biohermal reef, very light gray on fresh surface, very fine grained, probably mostly recrystallized? 22) Covered, 9'. 23) Limestone, brown-gray weathering, dark gray or fresh surface. Coll. 8/22/58/6. PG. 111 {note: illustration: bed 20: 7/17/57/9 bed 21: 7/17/57/10 bed 23: 7/17/57/11} 24) Covered, 20'. 25) Limestone, weathers orange-brown, has brown (Iron stain) chert nodules - 9'. 26) Covered, 36'. 27) Sandstone, quartz grain, medium; Calcareous cement. Brown and green grains, chert and quartzite pebbles (1/4" diameter to 1/2"). Some massive beds, some in 1/4" laminar. 31'. 28) Conglomerate; has some sand in it as 27, just that pebbles become 4" to 8" diameter and up to about 75 to 80% of lithology. PG. 112 There is almost no limestone in this conglomerate, but it still seems to be the "Hess" conglomerate. In other beds limestone boulders and cobbles are as high as 70%. #20 In the stream draw, interval 20 is exposed. Calcareous shale and sandstones, rich fusulines free in slope wash. Collection 7/17/57/9. White to light cream weathering. Becomes more Calcareous and grades 2-3' into wavy bedded base to biohermal reef. 35'-40'. The #4 and #5 limestone of King's Gaptank appear to have beginnings in the "Uddenites" zone just to the west of Gaptank. I find no field evidence which would assign a Wolfcamp age to King's W.C.L.s in this area. It is not until we get above that unit that we find a distinct break in lithology.
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PG. 113 7/18/57 East of Texas Highway 51, beds of what I believe are Wolfcampian age (at least lithology) are folded and faulted quite badly. The axis of a syncline strikes N74W from peak of K on NW sides of road up a valley in K on SE side or road. [Slides read 7-18-57-11.] 7/18/57/1 is from a sandstone in the creek in this syncline. This "syncline" is probably drag resulting from faulting NE of locality 7/18/57/1. 50 yards NE of locality 7/18/57/1, beds are on end; probably another fault, not same one. These structures predate K, although the K is jointed or even faulted (1' through) in this zone of weakness. This little area is very complex - 2 sets of faults; one N74W or so and one N3 to 5°E. PG. 114 Gaptank locality Section 17 - This begins in Wolfcamp, concealed fault or faults - Near the base of W.C.. There are 1) A number of chert and quartzite pebble conglomerates and quartz sandstone - 8' orange-brown weathering, Chaetetes and tetracoral parts - 8/24/58/1. 2) Covered and faulted (probably) distance problematical, +/- 20'. 3) Calcarenite, orange-brown weathering, dark gray fresh many fusulines; crinoids, very fine ss matrix. (Collection 7/18/57/2 coarse in slope) 4" to 2' beds, shale partings; 9'. 4) Covered 33', passed one upturned outcrop - marks N74-75°W fault of about 10' throw, south west side up: at 63' the outcrops strikes nearly north south - apparent cut by a fault in that direction, east side. [faults add about 30' to this interval better exposed north of old road]. 5) Calcarenite, orange-brown weathering, shell hash 1.5'. 6) Mostly covered - a 6" unit like 5 seems to crop out in middle of unit. [5']. PG. 115 {note: illustration: bed 2: 7/18/57/2 bed 5: 7/18/57/3 bed 7: 7/18/57/4} 7) like unit 5, in 3" to 8" beds, 4'. The back of this unit has been faulted off. 8) To the best of my ability I believe I found the same beds as 5, 6, and 7, covered for 13', then 9) Calcarenites, orange weathering with an increasing % of quartz sand, upward; Interbeds of conglomerate quartzite and cherts common but with some limestone, many beds are dominantly limestone 24' - upper part dominantly conglomerate - lower part ss. 10) Covered probably the same as 9. Collection 7/18/57/5 - P.King Chaetetes limestone at base of Gaptank along old road. (N dip of anticline is type area).
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PG. 116 The Kings did not recognize the complicated structure of the Gap Tank area. I believe this #4 and #5 Gaptank limestone are the same bed, faulted into 2 portions. The N75-74°W faults do this, and the N-S faults tend to make the units appear thicker than they are normally. The conglomerate in the eastern most “upper” Wolfcamp contains Tenus (+Haymond) and Dimple, the Dimple in very dark limestone, the Tenus and Haymond are quartzite. The massive limestone member of the Wolfcamp seems to grade laterally into bed 3, section 17, but faulting may make the picture more complicated. Fossils look like the only answer to the question of just were to place there “upper” Wolfcamp beds in Section 17. The conglomerate would suggest it should all be called Hess, but the lithology is similar to the upper Wolfcamp. The fossils suggest an environment similar to the Uddenites interval. These beds are slightly more coarse than the type section of Wolfcamp, but PG. 117 we are about 12 miles? away too - There is no typical conglomerate of the Hess before we get into the silty quartz Hess beds here. Problems! It will pay to investigate the outcrops in the Canyon south of the Allison Ranch. The “Wolfcamp” may be exposed there, but I really wonder! PG. 118 7/19/57 Mr. Moore wasn’t at home (Ranch); lives in Midland. Decie Ranch The conglomerate lithology C.O.D. pointed out as Wolfcamp pinch the shale interval out to the southwest. The biohermal horizons Jarvey mentioned near the road, I believe are southwest extensions of the lower Hess ledge. The lower Hess ledge 1/2 mile northeast of the first stop contain “Wolfcamp” lith conglomerate high into the unit. The lower Hess ledge is in beds of 1’ to 3’ limestone at this southwest locality but the lower beds become massive to the northeast and the upper limestone of this interval gradual thin out within 1.5 miles to the northeast. The conglomerates below look like those {note: illustration followed} within the Hess (lower) ledge. At this southwest locality I believe Jarvis has mistaken the upper Hess ledge for the lower Hess ledge. PG. 119 Collection 7/19/57/1 - a limestone cobble in the Wolfcamp conglomerate. From a free back, but apparently from lower 1/2 of exposed conglomerate section about halfway between Wind Mill and stop 1. PG. 120 7/20/57
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Decie Ranch southwest end of Lenox hills. Section 18 - 1) Conglomerate, base of unit concealed. Has a lot of Haymond type pebbles, gray sand matrix, a rather small amount of CaCO3 cement. Not knowing if the dip here is significant, I will level up through the conglomerate beds. This unit is in part covered, but the conglomerates are coarse and are the only outcropping rocks - 55', Cobbles of Conglomerate - Collection 7/20/57/10. 2) Limestone, gray calcarenite, same minor amounts of fragmental cherts, dip about 10° WNW zones within this limestone unit are quite conglomeratic. The chief distinction between this and #2 is limestone sands make up the matrix. The conglomerates peter out in about 7', but very fine pebbles are present in the limestone higher in this unit. Top of unit is very siliceous, well sorted, forms a 1" plate. Bedding below is 1' to 4'; 52'. This unit I believe equal to Lower Hess Ledge. 3) Covered 4'. PG. 121 {note: illustration: bed 1: 7/20/57/10 bed 4: 7/20/57/1 bed 9: 7/20/57/9} 4) Siltstones and very fine sandstone - siliceous cement laminar but often irregular texture; siliceous cement is secondary see 7/20/57/1, 11'. 5) Limestone, clastic, with chert pebble 1', thin to northeast thickens to southwest. 6) Like #4, 5'. 7) Like #5, 1.5', thicker to southwest. 8) Like #4, 6'. 9) Limestone, clastic, 3 beds 4" to 8" thick, each with well sorted flat tops, separated by siltstones; 3'. 7/20/57/9. PG. 122 10) Covered 3'. 11) Limestone, conglomerate, chert and quartzite large pebbles; limestone clastic sand size matrix. 1' to 2' beds; Top is same old flat surface, well sorted, and silicified 1/2" to 1". 12) Covered, 24', probably clastic limestone and conglomerate. 13) Limestone, organic frag., bryozoans, crinoid (stems) brachiopods; 7/20/57/2; 1.5'. 14) Covered, 5'. 15) Limestone, organic frag. 7/20/57/3, rubbly at base, becoming well sorted in upper 6", top 1" is silicified and laminated, top is flat. 2.5'. 16) Covered 5'. 17) Limestone, organic frag and clastic, some small chert granules - a fusuline or so, echinoid spine [2']. 18) 17' covered.
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PG. 123 \n{note: illustration: bed 13: 7/20/57/2 bed 15: 7/20/57/3 bed 21: 7/20/57/4; 7/20/57/8} \n19) Limestone fragmental (organic) and quartz fine sand, crinoid frags and brach shells, become more sandy upwards. 9'. 20) Covered - 6'. 21) Limestone, clastic, gray weathering like the other lower clastic limestone, has flat top with 1" siliceous zone 8" to 1', 7/20/57/4, 5 repeats of this lower lowest lithology (at least) in 8" to 3' beds; 18' near top some chert chips. 7/20/57/8. 22) Sandstone, very fine size, weathers light brown thin but uneven laminae. With 2, 3" limestone of the #21 type. 9'. \nPG. 124 \n23) Limestone, clastic and organic frag. gray weathering with a tinge of brown. 2 cyclic beds one (a) 3'; (b) about 4'. Collection 7/20/57/5. Flat tops are silicified and weather a brown Iron oxide color. 7'. 24) Covered, 14'. 25) Limestone, calcarenite, both clastic and organic frags, weather light gray- brown. 1' to 2' beds. 12'. 26) Covered, 31', probably light brown very fine sandstone or siltstone. 27) Marl? This unit is worth additional study. Massive Rx, no bed except near top in a irregular surface. 2 shades of silty limestone; one light brown one light gray - they occur interlocked with each other - also coarse sand size chert and limestone fragments are twisted and warped through this bed. Several kinds of brach shells, bryozoans, and fusulines. I believe this is a bed of slumped material. \nPG. 125 \n{note: illustration: bed 23: (a) and (b) 7/20/57/5} \non over steepened Permian near shore deposit, a 3" diameter pebble is staring at me. 1.5'. 28) 7', light brown weathering, very fine sandstone. 29) Limestone, gray (dark) clastic, some 1/4" diameter chert and quartzite, 1/2" red-brown siliceous upper surface. 6". 30) Like #28, 8'. 31) Limestone, light brown to gray-brown weathering; very silty and very fine sand size - an irregular 3" band of very fine pebble. 1/2'. 32) Covered, 13', probably like #28. \nPG. 126
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33) Siltstone, very limy, light brown to brown-gray weathering. 34) Sandstone and siltstone, sandstones very fine grained grades into a 1' to 1.5' lime rich resistant beds. [8']. 35) Sandstone, very fine grained, light brown weathering up to 1" bedding - 23'. 36) Covered, 5'. 37) Sand as #35 - 8'. 38) Limestone, gray weathering 8", has a little cephalopod in it. 7/20/57/6. 39) Sandstone, very fine grained, light brown weathering 8'. 40) Limestone, Massive, gray weathering, biohermal, Upper Hess Ledge. PG. 127 {note: illustration: bed 38: 7/20/57/6 bed 40: 7/20/57/7} Collection 7/20/57/7 - a piece of float, found at about bed 34 - it is a gray limestone so is either from about #38 or, most likely from #40. Upperpart, through bed 29, of this section the sequence of lithology is rather cyclic, even the Hess (?) in it upper part shows cyclic deposition but with the change of either source of sediment or of depositional environment. I frankly don't know exactly where to draw the Wolfcamp Conglomerate, the bed #2 limestone I believe is equal to the lower Hess ledge. King calls the lower limestone ledge Hess, and the upper ledge, the first Leonard limestone member. Section 18 thus includes Wolfcamp (part), Hess, and lower Leonard brachs. PG. 128 7/21/57 Section 19 - up to eastern most cliff forming Wolfcamp Conglomerate - topped by Hess limestone ledge. Decie Ranch. The lower part of this section is covered and it is jumbled up. no dip 0) Covered below 1) Sandstones, green-gray weathering, much green silty material, 6", Collection 7/21/57/1. 2) Conglomerate, brown weathering, mostly 1/4" to 1/2" chert pebbles, brown sand, but few crinoid stem fragments, 5', 7/21/57/2; 2" to 6" beds. 3) Covered, 10'. 4) Limestone, medium gray weathering, biohermal, no definite bedding, large cephalopods, crinoid columns, fusuline (very large for Penn., could they be Pm?) brachiopods - 29'. Collection 7/21/57/3. (Rained out) {note: illustration: bed 1: 7/21/57/1 bed 2: 7/21/57/2 bed 4: 7/21/57/3; 7/29/58/1; 7/22/57/1}
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PG. 129 7/22/57 5) Limestone, with 30-40% chert (and quartzite) pebbles - gray to gray-brown weathering; a few limestone pebbles. 3' beds, from about middle of unit upwards, large limestone cobbles appear, a few horizons are nearly sandy (coarse); 46'. It should be noted that the upper 2/3 of this unit could probably best be called a conglomerate. The limestone is nearly completely lacking except as cobbles in the upper half. About 5% of less of the upper rock unit is limestone cement. 6) Covered for most part, exposures are conglomerate, chert and quartzite, limestone cement. One big limestone block at 38' (Collection 7/22/57/2) 145' - I'm separating this as a unit only because of the weathering characteristics. 7) Conglomerate, poorly sorted to no sorting, chert, quartzite, limestone pebbles; some small cobbles - lime cement. Mass, cliff forming. Become coarser (small to medium boulders) upwards. 84', 1' to 20' beds. 8) Covered - 65' this is probably the extension to the west of the green-gray shale and calcarenite tongue. PG. 130 9) Conglomerate, brown and gray weathering. Limestone, chert and quartzite pebbles, brown sands, not sorted; base is covered. 3' or more (7/22/57/3). 10) Calcarenite, dark brown weathering. Zones of pebble (10%) in calcarenite. 2" to 2' beds very irregular channelling in top of bed 10. 22'; has a flat top, siliceous clastics are dominant. 11) Conglomerate, chert, quartzite and limestone; limestone locally dominates to make this a calcarudite but chert and quartzite dominate elsewhere (with 5' horizontally). (7/22/57/4) 35' up predominantly limestone in the upper 10' (>50%) has brachs, bryozoans, crinoid stems and coral, besides the fusulines. I think it could be called near biohermal both in formation and position during Pm. 49'. Brown and dark to medium gray weathering. Has blocks and small lenses of light brown silty which weathers out leaving vuggy appearance. PG. 131 {note: illustration: bed 6: 7/22/57/2 bed 9: 7/22/57/3 bed 11: 7/22/57/4; 7/22/57/5 bed 12: 7/22/57/6 bed 19: 7/22/57/7 bed 21: 7/22/57/9 bed 24: 7/22/57/8} 12) Calcarenite, medium gray weathering; has granule size organic fragments, 6'. Collection 7/22/57/6, 2' beds. 13) Partly covered - apparently alterations of brown silt and sandstone and calcarenites. 3 cycles - 6'; 6" to 1' limestone.
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Calcarenites in 12 and 13 have flat top brown siliceous stained. PG. 132 14) Conglomerate, about 6" grading up into a rubble of algal, sponge, a few fusulines which may have been transported, crinoid stems, 6'. 15) Sandstone, light brown 1/16" to 1/2" beds - 7'. 16) Limestone, calcarenite, with organic frag. granule size, 1'. 17) Sandstone brown - 6". note: here the calcarenite is irregular at its base and rests on eroded and weathered brown sandstone - (apparently the major break in sedimentation?) 18) Like #16, 2'. 19) Limestone, biohermal, gray weathering with brown conglomerate chert pebbles. 7/22/57/7, 6' becomes a calcarenite at the top (2') and a flat top surface with siliceous iron (brown) weathering. PG. 133 20) Sandstone, brown, like #15 - 4.5'. 21) Limestone, rubble, with chert conglomerate and limestone conglomerate cobbles: grades into a calcarenite (upper 6" to 1') with a flat, siliceous iron stained upper surface. Collection 7/22/57/9, 7.5'. 22) Sandstone, light brown weathering, much coarse calcite sand with the fine quartz sand. 2'. 23) Limestone, massive, brownish-gray weathering chert pebbles, and limestone boulders scattered in this. 15'. 24) Limestone, mostly calcarenite - 4 cycles of rubble through calcarenite to flat top with siliceous Iron stained; 21'; (at top 7/22/57/8) top of ridge. 50' northeast of measured section a chert and quartzite conglomerate has cut a 8' channel in unit #25. This conglomerate appears very much like unit 8 (in the lower part). PG. 134 The conglomerate intervals 1 through 8, thicken northeast ward toward the old Decie dry hole. This is accomplished by a slight thickening of individual beds in that direction, but also by off lap in what are apparently large channel bedding. {note: illustration followed} PG. 135 Section 8 - Wolfcamp over lies Gaptank angular unconformity. Gaptank strike N75W dip 9° NE. Collection 7/22/57/10 and 7/22/57/11 in Gaptank at this point. 1) Limestone yellow weathering, yellow is from a high % of silt, shot through with Calcite veins 7/22/57/10; 30'; covered below.
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2) Limestone, biohermal, dark gray to medium brown, yellow weathering silts, chert pebbles and limestone cobbles, 2 beds, 14' (Collection 7/22/57/11). 3) Conglomerate, brown weathering. Cherts, quartzite and gray limestone, brown sand; This unit laps up side of high (top) in #2 bed and finally covers over the top. Strike N30E, dip NW11°, 29'. {note: illustration followed} PG. 136 4) Sandstone, brown to gray, siliceous weathers purples, magentas and orange locally, 14'. 5) Conglomerate, brown weathering; has sand of #4, cherts and quartzite (but little or no limestone) medium pebbles; has the dark weather colors of #4 - secondary! replacement, 6" to 4' beds. 74'. Moved SW along bed 5 - 100 yards, to a point opposite creek bed. 6) Sandstone, yellow to yellow brown weathering, 1" to 3" beds, a lot of silt and fine to very fine sand size; quartz, poorly cemented. 6'. 7) Conglomerate, pebbles of chert, quartzite and limestone; light gray-brown sand matrix. 4'. 8) Shale, brown, some gray-blues; a 5" brown weathering sandstone top, total 6'. Collection 7/22/57/12. 9) Conglomerate like 7, 2.5', with 2 interbeds of #8. 10) like #8 with 2 - 3" to 4" conglomerate beds like 7 [8]. PG. 137 11) Conglomerate, pebbles of chert, quartzite; brown sand matrix; weathers brown to brown-gray, 2 beds, one 2' massive, upper one is 1' flat top of fine sands, 3'. (continued on pg. 143) ------------------------ 7/25/57 - Van Horn area, Eagle Mts, east side. Collection 7/25/57/1 - shale zone in Hueco - about lower 1/4 of outcrop - This is James Underwood's Thesis area. 7/25/57/2 Wolfcamp? (Sample 7/25/57/2 of James Underwood U of T). NE end of Wolfcamp hill NE of Eagle Springs Ranch House - was base of hill massive, dark gray limestone. 7.25.57.3 (4 to 6' above 7/25/57/2) The Hueco? is exposed in several localities here: a) In Page Twiss' area in the Van Horn Mts. the Hueco is a dark dolomite in its entire sequence above the PowWow Conglomerate - 800 to 900 feet. b) In the Eagle Mts. James Underwood's area the Hueco becomes sandy in the lower and upper parts - same dark gray limestone (dolo?) in the middle, 600'?. PG. 138 The Hueco exposed in Page Twiss' area is a dark fetid dolostone; Echinoid spines and some products of brachs are silicified prior to dolomization, but nearly all other fossils have been dolotimized and either completely lost or lack any structures; just outlines. In the Van Horn Mts. there is about 800-900' of Hueco -
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about 40-50' of PowWow Conglomerate and transition zones. It is similar to the basal conglomerate of the Wolfcamp and contains siltstones and sandstone possible of the equivalent to the Uddenites zone, but not the same facies. In James Underwood's area the Hueco is about 600-700' in the eastern locality (7/25/57/1) and perhaps thicker in the NE locality (7/25/57/2 & 7/25/57/3). These last 2 localities are near the base of the base of the unit but the exact horizon was not determined. There is some structure complications in this area and so more detailed work is needed. The presence of siltstones, shales and sandstones in the first locality suggest the lower 1/3 and upper 1/3 are not normal deep basin deposits like the middle 1/3 but (continued on pg. 139) PG. 139 7/26/57 Collection 7/26/57/1 from base unit of Igneous rock - above Boquillas limestone (K) - This is a possible freshwater limestone in prevolcanic time. Black Peak east of Wylie Mt. Collection 7/26/57/2 - South of Van Horn about 15; The 3 sisters, western most peak {note: illustration: bed 1: Trachycite bed 2: 200'; water bedded tuffs bed 3: 10'; Trachycite bed 4: 10'; Calcium rich and tuffs; 7/26/57/2 bed 5: Trachycite} cont'd from (pg. 138) but rather are near the margin of the basin, probably the SW side. I've promised Jim to let him know what fusulines are from the second and third localities. In general a measured section in this larger region seems to promise little in the way of fusulines. See: Baker, U of Tex, Bull. 2745 (?). Gielerman, 1953, U.S.G.S.B. 987. PG. 140 7/27/57 Wolfcamp Hills - showed C. Ellis around area. Collection 7/27/57/1 - Uddenites zones west side geologist's Canyon in saddle. Collection 7/27/57/2 - Float, near bed #22, section 4, see page 35. Collection 7/27/57/3 - see page 52; bed 15, section 6. Collection 7/27/57/4 - Uddenites zone (biohermal locality) NE of Windmill on main reef. James Robert (Robby) Moore III, Tex. Co. Research Lab, Houston, Tex. mentioned many of the oil company fellow find the Hess in the western (Lenox) part is equivalent in age to the Wolfcamp in the type area and eastward. Also
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that the brachiopods and the fusulines may indicate different eyes in comparison to other areas. Robby gave me a couple of samples from near Shafter, Tex. He believed of Pm. age. They contain orbituloida and couple of Mollusca of undoubted Upper K age, probably Georgetown. PG. 141 My theory on the cyclic bedding in the upper Wolfcamp is as follows at the present time: 1) Downwarp of Wolfcampian basin to north Deposition of gray and tan shales and a few siltstones gradually filling edge of basin, but beyond "reef" facies. 2) Biohermal activity encroached on this more or less flat bottom "mud" flat from reef (to south) in a northward direction. This accumulating until wave action takes over control. 3) The wave action sorts and worked the later deposits of the biohermal deposits to reduce grain size, increase relative % of quartz and form laminar bedding in upper inch or so. Bypass was important and represents a considerate time of a lost record. Repeat back to condition 1. {note: illustration followed}. There is more to this than just this simple diagram. The east west facies change leave room for more questions than I have answers at this time. PG. 142 7/28/57 trip to Big Bend Park. Collection 7/28/57/1 - 27 m south of Marathon - Glenn Rose upper marl zone; Orbitolina texana. 7/30/57 Collection 7/30/57/1 - light gray shale beneath freshwater limestone in spur between Calamity and Sheep Cks about 26 miles south of Alpine. See ref. Goldich and Elms (CI of Tex. Bull?)- They assign Eocene age to this limestone in Pueth tuff sequence. Stop 14 Big Bend Guide Book. Collection 7/30/57/2 - limestone part of freshwater sequence above. PG. 143 7/31/57 Section 8 (cont) - dip 10°NW. 11) Covered 30', probably gray-brown shale for most part. 12) Calcarenite, greenish and orange-brown weathering, poorly sorted at base, includes dark "light-colored" cherts; very fine green quartz sand, Brach, Crinoid and fusuline frag. The lower part is near a granular or fine pebble conglomerate. Upper 4" becomes well sorted. Collection 7/31/57. Wood frags. common, bryozoans common. Slightly undulate upper smooth surface (3.5'). 13) Covered, 13', probably gray shale. 14) Gray shale, with brown tinge. Collection 7/31/57/2; 5'.
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15) Calcarenite, like #12, but conglomerate pebbles larger, 4.5', becomes better sorted (Collection 7/31/57/3) and finer in upper 4" to 5" flat to surface. 16) Covered 11', probably mostly gray shale. PG. 144 17) Calcarenite, yellow-brown weathering, because well cemented and with siliceous pebbles in upper 5", 1.5', Collection 7/31/57/4 from #17 and loose stuff, probably from shale just above and just below #17. 18) Shale, gray to gray-brown, slightly silty 12'. 19) Calcarenite, yellow-brown weathering; lower 8" are pebbly conglomerate a 1/2" shale break and the upper 4" to 5" are well sorted, evenly laminated quartz sand and calcite sand, fine size. Flat top with an Fe3+ oxide zone of very fine sand sizes. 1'. 20) Shale, brown-gray, 28'. Near top Collection 7/31/57/7. Near base Collection 7/31/57/8. 21) Covered, probably like #20, may have several calcarenite (gray), beds. 26'. 22) Limestone medium gray, with a large % (25-30%) Cobble conglomerate. This might be best called a conglomerate with limestone cement locally. Beds are 2.5' to 5' thick; 18'. Collection 7/31/57/5. PG. 145 23) Covered 5', less resistant zone of limestone rubble? or finer sand? 24) Limestone, massive, locally conglomerate (quartzite, limestone and chert) medium gray weathering (see 6/24/57/2); upper 3"-4" bed is fine grained, flat topped. 25' Biohermal "Hess limestone" of King. Collection 7/31/57/10.. 25) Limestone, rubble, some conglomerate cobbles - lenses of 6" to 3' beds - contains biohermal junk crinoids, bryozoans, large fusulines, brach. Collection 7/31/57/6, 3'-5'. This unit thickens to about 8' to the SW just above the Kinkajew dens - (about 200'). Section 20 continued about 200' to SW above Kinkajew dens - followed at top of bed #24. 25b) Sandstones, light brown-gray grading up into a conglomerate and organic frag. hash. Has a well defined planar top with Iron stains and cement. Tetracorals common, also Productid shell frags.; 8'. PG. 146 7/31/57 & 8/1/57 26) Covered, 15', one 8" bed of siliceous pebble conglomerate exposed in middle of unit, rest is probably gray shale (?) . 27) A series of orange-brown weathering, fine pebble conglomerate, from unsorted at base to well sorted at top, with flat upper surfaces - upper 2" are well cemented with SiO2. Collection 7/31/57/9 at base. Several beds of siliceous very fine sandstone or siltstone, 10'. 28) Shale, dark gray-brown, 3'. Collection 8/1/57/7.
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29) Calcarenite, orange-brown, organic frag.; very fine pebble size; crinoid stems, echinoid spines. 6". 30) Shale, medium gray-brown. 2.5'. 31) like the beds in #27 - crinoids and fusulines. 6"-1'. 32) Shale, dark gray, 16'. 33) Calcarenite (with high % of chert pebbles too) grading upwards through calcarenite to quartz sandstone with iron oxide cement. Weathers - Pale yellow-brown to a deep orange-brown at top. PG. 147 34) Sandstone, weathers light tan to buff. Grades into a siltstone and then into a shale. The fresher shale is dark gray. 9'. 35) Covered 12', probably mostly dark gray shale. 36) Shale, dark gray; and siltstone, weathers light yellow-brown. These two lithologies grade back and forth horizontally as well as vertically, 16'. Collection 8/1/57/6. 37) Calcarenite; dark gray (fetid); weathers a medium yellow-brown. Full of fusulines. Collection 6/24/57/7, 1.5'. Surface silicification of fossils; also the upper surface is flat, well sorted, laminar fine calcarenite with siliceous zones. 38) Siltstone, light yellow-brown weathering; with lenses of calcarenite; rather well sorted but not laminated. 9.5'. 39) Covered. 18'. Collection 8/1/57/5 from a poorly exposed bed in middle - like #40. PG. 148 40) Calcarenite, light gray-yellow, darker frags of fusulines, algal masses and other fossils. Irregular lenses of tan siltstone in various attitudes to bedding - 3'. 8/1/57/4. 41) Siltstone, finely laminated, yellow light brown weathering. Grades upward into dark gray shales; 29'. 42) Calcarenite; organic frag; brachs, bryozoans, crinoid stems; echinoid spines; fusulines. 1'. 7/26/58/7. 43) Shale and siltstone; some mudstone, weathers tan (light yellow-brown); dark gray on fresh surface. 42'. 44) Sandstone, light brown weathering, mud gray-brown on fresh surface. Has fossil frags in lower part very silty in upper part. 1'. 45) Shale and siltstones, light yellow-brown to medium gray weathering. In upper 2', lenses of organic fragmental limestone appear. 29'. PG. 149 46) edgewise conglomerate? Limestone, organic frag., medium gray weathering; tetracorals large crinoid stems, brachs, bryozoans. Bottom is irregular, seems to follow cut or eroded top of #45. The top of #46 is smoothly undulatory, siliceous upper 2". 8" to 1' (shows siltstone conglomerate toward drainage).
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47) Sandstone, very fine quartz, very silty; light gray-brown weathering, no apparent bedding irregular blotches of varying shades of color. 0-1'. 48) Collection 8/1/57/2. Siltstone, light gray-brown weathering, rests on irregular top of #48, in one location rests directly on #47. Fills the trough so formed evenly and within 1.5' is evenly bedded. 14'. 49) Collection 8/1/57/1. Calcarenite, very fine grained; weathers light bluish- grey. Rich in brownish silt. Has a small coiled cephalopod fauna, see bed 38, sect 17. 2'. (a unit like #51 between the 2 limestone beds of this unit). 50) Covered, 9', probably similar to #49. Light brown, sandstone very silty, poorly cemented. 51) Calcarudite and chert quartzite conglomerate with one or two siltstone beds. 8' light gray weathering except for cherts and quartzite pebbles, some limestone cobbles medium gray. PG. 150 52) Limestone, organic frag.; light gray weathering Productids, crinoid columns; upper 2" rich in siliceous cement and fossils. 2.5'. 53) Alternation of limestones like #52 and siltstones like #45, at least 4 alternative interval is poorly exposed; siltstones have siliceous bands. 12'. 54) Calcarudite, cobbles 3" to 6" diameter; about 5% or less siliceous rocks in this unit. 8'. This seems to form the base of King's 1st Basal Leonard limestone. 8/1/57/3, float found near bed 43. I believe it has come down from either bed 50 or in the Leonard above. 8/1/57/10 - NE of Section 20, 200 yards, from bed #24 - one light colored black, grayer ones are in matrix of rock. PG. 151 Afternoon (8/1/57) walked along Wolfcamp interval to the NE about 1 mile. The upper shale of the Wolfcamp is poorly exposed along here and even the basal conglomerate of the Wolfcamp is incompletely exposed. The Dimple is exposed in a window (?) in the Dugout Ck Thrust sheet. Dimple is the apparent source for much of the lower Wolfcamp conglomerate at this point. Collection 8/1/57/8. Haymond? is exposed just to the SW of the Dimple; (8/1/57/9)is from sand and siltstone in Haymond. {note: illustration followed} PG. 152 Collection 8/1/57/11 - This bed is dipping slightly toward the town of Marathon, not a good exposure, but believe this is Gaptank thrust over Haymond onto Dimple. The diagram on page 151 shows 2 limestones thickening and thinning. This is really caused by a fault - raising the NE side about 60-70' with respect to the SW side. The thickening and thinning of the Hess limestone I'm sure does take places but perhaps not on the order of magnitude pictured on page 151. The Sullivan Canyon fault cuts the NE end of the Decie (Lenox) Hills. The lower Leonard limestone is dropped on the NE side to a point below the Hess sacchinella reef. The picture is confused by several twisted or rotated fault
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blocks, in parallel to main fault system. Just SW of Windmill, in line with the Sullivan Canyon fault, there is evidence of a fault - the NE side has black chert (Tenus or Dimple?) faulted against Wolfcamp? or Gaptank orange-brown sandstone. PG. 153 The amount of cover NE of the place section 20 was measured obscured the geologic relationships. I believe the conglomerate of the lower Wolfcamp is missing in part and pinches out completely over a couple of Haymond and Dimple (Wolfcampian) hills. The evidence is negative because what I believe is Gaptank sandstone (orange-brown) has no conglomerate cover. The Haymond clays and sandstones are exposed very close to the Hess sacchinella reef and no conglomerate is exposed typical of the lower Wolfcamp. These faults according to P.King's map line up fairly well with the 3 that flank the north end of Cathedral Mt. He maps the black chert as Ord. Marathon "V" unit. The orange-brown beds as Gaptank. They look much like some of the biohermal masses in the Uddenites zone, however. The Dimples cherts are present in great abundance in the conglomerate (see sample 8/1/57/8) which may represent the lower or basal portion of the Wolfcamp. PG. 154 Lenox Hills near Sullivan Ranch Road. P.King has mapped the Hess as being faulted about 50-75' down to NE with one fault. I believe there are several smaller faults parallel to the main one. I will sample from the section below the NE nob, but I believe the Leonard is faulted below the Hess at this point and the Leonard cliff forming limestone caps it. G.A. Cooper in the West Texas Permian guide books, 1957 mentions that it seems to be Leonard. PG. 155 8/2/57 Section 9 Section 21 - Sullivan Ranch Road at NE end of Lenox Hills. P.King called this interval Wolfcamp, I believe it is probably Hess. 0° dip for measurement. 1) Limestone, medium gray, more or less massive, forms lowest part of slope - 8/2/57/1. The lower 5' of this unit contains chert pebbles (fine) in well defined bedding band. Dev. and Ord. cherts. Upper 1' is orange-brown well sorted; total 34'. 2) Covered, 34'; patches of light brown siltstone and sandstone crop out here and there in this interval but no definite relationships were determined. In the upper 15' several biohermal rubble limestone appear to be present. 3) Medium to dark gray calcarenite; well sorted, upper 1/2" is dark siliceous rich. 1'. 4) Shale and siltstone, light brown 1'. 5) Limestone, gray with a tinge of brown. Biohermal rubble - Crinoid columns 2" or more diameter. 3" to 2' beds - total 3.5'.
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PG. 156 6) Covered, 7' probably mostly light brown shales and siltstones. 7) Calcarenite, medium gray to orange-brown. A few small pebbles near base, grades into fine sand near top. Upper 1" to 2" siliceous ferric rich. 8) Covered, 25', this seems to be light brown shale for most part, some siltstones and some very fine sandstones. 9) Limestone, organic frag.; some black chert (Ord?) Crinoid columns, bryozoans and fusulines. 1' to 1.5'. 8/2/57/2. 10) Shale, siltstone and very fine sandstones; light brown weathering. 17'. 11) Covered, 27'. 12) Massive limestone, light gray to light tan weathering. Lower 6'-10' have large limestone cobbles, small amount of fine chert pebbles. Collection 8/2/57/3. 58'. This unit has been dolomitized top of NE most knoll. PG. 157 Section 22 - NE of Sullivan Ranch Road. Starts between 2 windmills. Gaptank below is badly folded and faulted, chert conglomerate, breccia in the greenish chert, beds of chert below seem well bedded and not excessively broken - Gaptank limestone is present as well as brown sandstones. 1) Conglomerate, much chert pebbles and limestone cobbles. Brown cement or matrix dip is about 15° due N. 20'. Becomes fine upwards, some organic fragmental material comes in. 2'-3' beds. 8/2/57/4. 2) Limestone, medium gray, mostly organic frags., some small chert pebbles. Crinoid stems dominant. Has brownish hue (weathered), Collection 8/2/57/5 about 20' up from base. Collection 8/2/57/6 about 60' up from base - thickness - 78'+ the upper beds dip south about 46 to 60°, I suspect this unit is faulted Leonard, a thin bit of upper Hess is #1 and no lower Hess or Wolfcamp at all. Leonard or Upper Hess resting on Dimple, Haymond Tenus and Cabaous. PG. 158 In walking over this outcrop as far as the Decie fence line there seems to be no exposure of Pm rocks older than these in section 22. The green-brown silty sands (Haymond?) is in a very tight syncline or overturned anticline which strikes near E-W paralleled with the fault in the Leonard. I believe the displaced rocks are faulted down because I can trace this structure about a quarter of a mile. The Cabonferious breccia zone is quite thick here (40-50') and has an upper surface which appears wave cut. It dips steeply to the N (as much as 55°). This surface has since been distorted and is now cut by many secondary faults. The complete field relationships of these beds are unfortunately concealed. Collection 8/2/57/7 - Blue shale 20' interval below Hess limestone ledge, N45°W of Decie well now windmill. PG. 159 Collection 8/2/57/8 - Biohermal or Biostromal zone in base of Wolfcamp Conglomerate (G.A. Cooper locality) almost due west of Decie well-windmill.
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It would be nice to check the outcrops on the Iron Mt. Ranch that P.King mapped as Wolfcamp. The Leonard Mt. section will have to suffice. Why should P.King have missed this important structure by the Sullivan Ranch Road? Probably didn't walk over it (?). 8/3/57 Shipped 138# of rock specimens in 3 sacks, the heavier two were double gunny sacks. END OF BOOK ONE 1957
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