Field Notebook: CO 1951a

Waage, Karl

1951

Yale Peabody Museum of Natural History

Original Source

Source Material:
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org

paleontology stratigraphy fossils Cretaceous Western Interior Seaway ammonoids

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154 Pages

MD-563 1 FIELD 1951 1951 doc.472 UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY — LOOSE-LEAF FIELD NOTEBOOK — 9-137

Faults in Front Range doc. 472 Yale University Division of Invertebrate Paleontology Peabody Museum of Natural History 170 Whitney Avenue P.O. Box 208118 New Haven, Connecticut 06520-8118 January 26, 2011 Ned Sterne 1981 W. Briarwood Ave. Littleton, CO 80120 Campus address: 170 Whitney Avenue Telephone: 203 432-3037 Fax: 203 432-9816 Dear Ned: I've now gone through all Waage material (notebooks, maps, and otherwise) looking for the word fault. The result is that in 8 notebooks dealing with the Colorado Front Range there are 25 pages that mention faults. Some of the pages have more than one fault. Some of these faults have strike, dip, and movement direction recorded. For the record, I've listed below the notebooks and fault pages below: IP Document Year Waage Ntbk # Ntbk Page 472 1951 1 1 " " " 37 474 " 3 17 475 " 4 48 " " " 52 " " " 56 " " " 57 " " " 58 " " " 59 477 1952 6 45 " " " 65 478 " 7 14 " " " 15 " " " 16 " " " 30 " " " 38 479 " 8 20 (+ opposite page) 480 " -- 1 " " -- 4 464 1955 1 8 " " " 9 " " " 11 " " " 30 " " " 55 " " " 61 I'm sending you copies of all these pages plus the complete measured section for each fault. In your copies I've put a red dot everywhere the word fault appears. Also included is a copy of one quadrangle map with two locs on it. So that we can keep track of this information a copy of this letter is being filed with our document 472 as well as the Division letter file. Let me know if you ever locate Waage's field maps and photos. Sincerely, Copeland MacClintock

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M.D. 563 - Front Range Clay - NOTE BOOK #1 K.M.Waage Ed Taylor (1951) 6553 PAGE Van Bibber Creek Area * Gent notes Section Routes40-6 section Morrison section (Dakota) Roland Browns Teble MT. locality Turkey Creek section Alameda*(Lower part Dakota section) - Notes from Goldsterns thesis Four Mile Creek section Perry Park (Upper part Dakota section Perry Park (Glencown exposure Deer Creek#1 Section (pzt) Golden Fire Brick (Notes-Mr Mueller Morrison section (supplement 1) Alameda*(Section from base uppers) Plainview (section of D+RGW cut) Golden F.B.Co(hogback section) Deer Creek #2 (section) Notes on correlations Canou City trip with Mr Kuechtel Box Elder-Bellvue trip " " " Definitions from Wilmarth originals. Greybullss, Muddy, Cloverly, Glencown , Little, Purgetoire -1- *Van Bibber offset of 'Little 3' - 74

Golden Horse. 20/1/316ED Ralston Buths Kassler Littleton Hill 2 ① N 50°W, 60° W overturned ② N 60°W, 85° to vertical over ③ N50W + ④ Big Fault in saddle ± N 8E ⑤ || 13+ Wpix - Roll 1 1 - S side Dzh Hughesck - Deer Cr, note. 2 - Channeling in Dzh, 3 to 7inc - Upper clay beds (Definitive Assoc SS N of Deer Cr, Mr. David Persons ) for A.E.C., clearene 1300 Glenarm See Mr. Goodhearts gal See Eckel & Kosch — about Recursion to do one AEC project, David W. Persons Proj. Eng. Rocky Flats Plant - Box 2611 Denver. Wednesday - Meet Barnes & Scott

N 22 E faulted contact

Van Bibber Creek area - Notes. 1. Fault in Hogback just N of Van Bibber Cr Strike of F between N65 and N85 E, slick surfaces at N55E and smaller Cs to NE but N55E sat ll's fractures + general trend of offset down scup & dip slopes. 2. Minor fault of about 2' displacement just below crest about 60 feet N of big fault shows strike N83E, Dip 54°S, slicks trend NE-SW, all measured direct from fault plane. 3. Golden F. B. Co., owns mine with tipple N. creek, Not mind out holding in reserve, contains highest-fusing clay owned by GFB Co. Get kg from McMiller

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Van Bibber Creek section. Pieced along S end Dakota hogback just north of Van Bibber Cr. in - Upper ss - ss. from top of massive (not incl. trans. beds into Graneros) 8.5 ss - med.gr. cross-laminated hard.. beds 0.6' - 0.2'; ripple marks on bedding planes; colour light grey; weathers buff -> iron brown. This unit thins and thickens in channel fashion along the strike. 14' ss thin bedded (0.05 -> 0.1) med + fin gr; gray; med gr beds weather buff & iron brown; partings of fine gr. gray res + shaly res, finely laminated med.gr. beds cross laminated. Local partings of silty shale, weathers gray and white in lower part. basal 3': massive cross-laminated chan- nel sand: local disconformity at base. 14' measured at deepest point of channel. 9' ss underbedded med + fine gr res res above: beds .05 -> 2.0 thick: DISCONFORMITY ss + clay (minor) hard fine-gr gray argill. res in beds 0.6 -> 2.0 becoming progres- sively fine argill and more sandy down- wards. Argill. res beds show no laminations: massive to concordantly fine, turning some frag plant stumps 10' +/- 2.

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m upper part: weathers light gray with mottled iron stains. Base[1] 1,3 is dark gray slightly silty clay shaly clay. WA CONT- Breakdown: disconformity at top. top 0,9-1,0 .7-1.0 hard; siliceous claysone: oolitic fair flint clay. [Sample 1] A,B,C. Colour gray to dark gray with brownish stains from plant fragments Lower 3" locally a brown-gray clay shale: soft, friable, with finely comminuted frag plant mat'l (equal Dry Creek Canyon clay bed???) argill. so clearly in upper 5' of interval; sandier below this and beds separated by shaly ss partings: prev. thin shale and clay also, locally, and ss beds form channels cutting into adjacent ss beds. Entire unit may lense out laterally along the strike. Base[1] clay is under about 6" shaly SS, is a dark shaly clay, Fe stained and more indurated at base. Rests on Fe stained surface on underlying SS. DISCONFORMITY 5-8' fine gr light gray ss: dense in beds 0.6" -> 2.0 thick. stained buff to iron brown prominent vertical jointing as fracturing: gray in fresh surfaces only. END upper ss. DISCONFORMITY at base of basal ss: ripple marks 6" between crests: current ripple marks: 3

1.0 2.6 1.2 2.5 2.8 1.8 5.5 4.8 2.0 1.0 4.3 9.3 3.55 a.32 5.31=3.12 3-adj

10: interbedded fine gr. silt, silty [unshab. grass] downward into interval below 2.6': dark grey, shaley clay becoming silty columnward; weathers blue-gray: hard platy, with lower part friable in higher part. 10 1/2': hard resistant argillaceous siltstone and fine sandstones; dark to light gray (wea- thins), iron-stained. Has plant frags., ch beds 6-8

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± 2.0: oo; fine to med gs; cross-laminated: beds 0.4

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5'-3" (m') concretions made up of concentration of iron specks (Specimen 2) 3.5: dark gray plastic well indurated clay: down lower part of above; some banding with laminae of very fine silt : Sample 7 layers of weak weathering clay: and some (Sample 8 non-staining on fracture plane in rock. (lower 1 1/2) 1.5: hard shaly clay: clay shale. dark gray with thin beds of siltstone: non- staining common around silty layers: Sample 9 lower .6': highly silty iron - stained (upper 1') with 1" of bentonite - like clay; waxy gray -> light gray with Fe' (?) blebs. plant fragments in top of that interval. Sample 10 the bentonite Break in section: begin at top with bentonite bed: so' is of the first ledge outcrop of middle sandstone. Above tipple. .1' Bentonite 2,3' grey to dark gray argillaceous siltstone minder amounts fine ss in upper part: some unbedded silty claystone: 1.6' dark grey silty claystone: (Sample 16) .6' hard gray finely ocured siltstone .7' gray silty clay local beds of siltstone 1.2' dark gray finely silty clay lower 1.4' silty brownish clay with plant frags. (Sample 17)

clay zone, not well exposed anywhere in vicinity. Shallow trench in weathered outcrop shows following section from base sandstone down 1.1 - Silty shale, iron stained! 1.6 Hard ledge, claystone - like porcellanite? Sample 18 1.7 Dark gray plastic clay, Fe stained layers of silt, Brownish clay in lower .3 .3 White very plastic clay, bentonite-like Sample 19 2.5 Alternating dark gray, mottled mottled plastic clay and Fe stained siltstone. (weathered clay v siltstone) .3 Siltstone bed, laminated top & base Fe stained .5 Dark mottled clay Sample 20, compost of interval meltinated,

3.7' siltstone with sandy layers: hard, new-tant, and irregularly bedded locally: more or less argillaceous: becomes softer some places along the strike: gray and brown gray: weathering light gray with iron staining. 6 Obscuried: probably clay or soft siltstone. ?? TOP OF MIDDLE SANDSTONE ?? 4.2' predom. siltstone with some fine so: irreg. bedded: locally ledge forming with unit below. 2.7 2') 2.2' 4.3' 2.5' 3.5' 3.6' 1.4' combine all these fine-grained locally silty irreg bedded in beds 4" -> 6" thick: mostly thin bedded. local massout appearance still shows lamination. whole so may be crossbedded. 3.3 -> inter bedded siltstone and fine sandstone, some clay. fine laminaize siltstone, bedsss up to 6" thick; silty sh beds & plugs of siltstone. moves ever down wavelet. see above 40.8 -> top of so: light rusty brown: fine grained: well laminated: changes from light rusty to white to light rusty down thru the bed: grain size coarse locally: div. fine gr. throught. rusty zones average about an inch thick: rusty zones slightly more resistant to weathering: whole sandstone thinly laminated, in verbedded throughout with more resistent zones of ferruginous as non-ferrugenerous zones weathers white. (This unit not cliff forming underrlies steep slopes.) It's some thing Jurassic silt. zones which seem to be more common near b2sc. Based 3 to 4' and upper 6' are fairly resistant good ledge formers.

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13.3' Sampled : siltstone and silty clay, thin layer siltstone in upper 4". dark gray locally iron stained: plant fragments. Weathers a light blue grey. Sample 21: upper half Sample 22 - lower half 6' med. gr. so. non-stained with hard caps of Fe cement in upper half inch (?? disformi? ity may be at the top of this sand layer, or between it and the sardstone below. 1' clayey siltstone: soft, light gray on weathered slope: 2.5' so: soft, friable, thin bedded with Fe stains; obtain from discoloration of numerous grain size particles scattered through. local beds undulated (this similar to so unit above overlying siltstone: relationships here may be strictly local) 21' SS: fine grained thin bedded irregular bedding planes beds (.1-.5") gray: finely speckled with brown-weathering grain size particles; whole wh. weathers platy; buff to brown, locally fairly well undulated: ledge-forming. Becomes poorly undulated laterally and underlies slope. runs slams and local channeling common in und. so. beds.

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1.5' fine sandstone, sandy shale, and minor silty sandstone. 3'+ with underbidded dark sandy shale and fine ss: ss speckled as above, in beds 1/2" to .3 (this shale more locally thicken and less sandy laterally. (see separate section of same) 12.5' ss: fine grained iron speckled, similar to above, less thin bedded than massive beds; end beds up to three feet: poorly undulated weathering to buff. local channelling within unit: concretary iron cemented zone locally present 8-9' feet from top. as above this concretary zone more resistant than those below it [lower 2'] becoming increasingly silty and shaly with few resting layers; grades into underlying unit. Underlying unit is silty to sandy clay grading to finely silty clay: weather (silty upper part) light gray with some iron staining, lower part gray with reddish mottling: may be due to weathering and not original feature. 1.2' gray argillaceous siltstone: weather white with irregular iron stain. 3.3' silty clay: gray to light gray in weather, ed surface; fresh color underneath, some iron stained streaks

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9' so: fine grained: in massive beds: cross laminated? gray to light gray: weathers buff and iron brown: surfaces take desert var- nish: 2.8' sandstone and sandy shale: upper 1.5' fine-grained sandstone: light gray plant fragments: alternating soft friable and fairly resistant layers. Lower part consists of very sandy gray to [brown in the pink light] with numerous layers of shaly sandstone. 5' massive to very bedded fine so: plant frags scattered throught: light gray: weathers buff and iron brown: becomes progressively argill. in lower 2' and seems to grad[es] into unit below: no sharp break recognizable between so and underlying unit below. 3' -> 4' sandy gray claystone grading to argill so: hard, conchy fracturing. some thin lenses of dark gray sandy shaly clay in upper part. Basal contact of this unit with underlying so appears to be gradational. 5' so: light gray: chiefly fine grained: poorly resistant: resistant where iron stained massive with blocky fracturing. May be local disconformity between this sandstone and conglomeratic so below: few meters at contact not exposed. cgl fairly fine grained. 10

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7' so: massive: mass-bedded: fine to med gs with layers of cgl so, up to .6' thick: separally scattered throught: so light gray to white on fresh surfaces, with darker coloured lenses where carbonaceous matter present more or less sparsely: only locally resistant weathering: lighter gray with yores of iron stain. cgl marks channel bottoms? at locality measured: 2 pronounced cgl layers: one at top: one at 5' from top: bottom layer thicker, contains frags. of chest and so mostly so & chest + grits in cgl. Disconformity - the big one 3'->4' silty clay: weathered section shows varicolored silty clay w/ pinky greens/b brown yellow gray layers in that order: becomes more silty in lower part where layers of silstone are interfedded with fine grained sandstone. This appears to be a local disconformity at the top of this interval. Buttwel! 49' fine to med gs so massive mass bedded + light gray to white: weathering light gray w/ & Fe stain along some surfaces and along joint planes. Puttled in lower 12: put caused by; 11't so: med -> fine gr. friable: few resistant beds: continualmally pitted so above but less resistant. interval includes several resistant beds with sand covered interval btw. these beds. Putting close out 5' from base & basal 2' no med gs brown weathering x - land as Discont next disc, or variegated clays below. 11

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silty 2.5 var. clays: red, gray & greenish: silty clay: 2 1/2 -> 3' thick (argill siltstone and sandy siltstone 2.3 <- gently fracturing; weathers light gray) underlain by more ves. clay. stup here Break in section: Dak-Granerus transition beds: 6'+ from top of massive first ss of Dakota. obscured by slopewash lower 8' 15.0 argill so interlidd with shale -> thin beds platy sandstone fine grained gray, weathering to light gray FC- staining on joint places and some bedding surfaces. Beds up to .5' thick average about .2' thick. Centruncated partings of sandy shale and calcary sandstone. upper 7' similar to lower 8' but increasingly shaly upward with sandstones becoming finely lam- nated and grading upwards into siltstones. Resistable argill. siltstone bed .5' thick cape interval. 5.71 dark gray clayey shale, weathers a light gray with rust staining on surface. No fossils observed. 0.3' Bentonit [0.8 hard gray, light gray weatherin argill siltston.

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3.5' Dark grey shale weathers fresh grey few silty layers in lower half. .6 Siltstone and fine sandstone thinbedded; beds up to .2' finely laminated; some silty shale in upper half. 2.7' Dark grey clay shale as above (look) as in preceding interval .5' Hard dark grey argill siltstone becoming shaly in upper part. Above this sizes near surface & disrupted by crop. No other silty layers appear above, but over 25' shale some cones locally and a bentonite bed about 15" thick.

3, 2,7 2,5 8,2.

Route 40 Section - Overturned block at N. end hogback Greenevos (rev'l) At top west side quarry .9 Hard siltstone, dk gray weathers light gray Fe stained. .2 Bentonite - locally weathers pink 6.1 Dark gray clay [shaley] weathers to light blue-gray clay shale, silty in lower part 8.5 Interbedded argillaceous siltstone with silty clay, siltstone in thin beds, weathers lite gray, splittery fracture shale interbeds decrease downward About 15 ft thick at top and with 54 strike 3.2 Siltstone, crazy , even beds (thin), laminated, lite gray silty shale at top,3, few shale partings Brezl - Continuous without overlap or gap (with above interuz) at roadcut's 40-6 8.2 Interbedded argillaceous siltstone with silty shale (loc silty), thin beds as in 8.5, zebra, increasing ly Silty downward 0.3 scale about .2 above base. B SP 3.3 Fine gr. ss buff to Fe brown weathering Thin bones Eql of shale chips throught--wostry in lowerks. [Prob local channel] .6 Dark gray shale with siltstone(.1 ft) in mid dart 4.0 Irrog. interbedded dk gray Siltstone with fines Beds .1 to .4 thick weathers lite gray with Fe stain along some beds. Shaley partings in lower feet. 4.0 DK gray fissile-weathering shale with thin laminez and interbeds of siltstone + shale, siltstone up to .13, Fine SS beds in lower foot weath. to brown Silty beds to lite gray, 14

11.6 4.4 4.3 7.6 6.0 34.0 x beddini N, 45. W Do W (autumn)

2.0 Fine to med grained ss, thinbed, x12m. Beds to .5', silty prngs at top. 2.6 Sandstone, Med.gr. massive x12m., locally friable [Dip & Strike on base - N.15°W, 60° W overturned] sandstone sugary grains well rounded, frays white weathering grains -? - concern on bedding surfaces - looks like beach sand - Ed says. Massive x 12m. bed. Plant fry casts on top below surface. 1.8 Grey clayey shale, 2ft siltstone with plant frags at base. 5.2 Sandstone, Fine grained, white in beds 1/2 to 2.0 thick, but thinner with siltstone lower sh lamination at top, Guelder to overlying sh. Weathering yellow-gray to light buff. 1.0 Interbed. dk shale with light siltstone, with 1/2 bed siltstone in middle part 2.4 Sandstone, fine grained massive, obscurely x 12m. Scolithus-like worm borings in upper .5' Bottom surface has blobs of Fe. 2.2 Interbedded (loose) Dk gray silt shale with light gray fine sandstone. Locally 2 sandstone beds highly varrable in thickness, 5.0 Sandstone, Fine grained, [illegible] cross laminated in beds 1/4 to 2.0, weather buff to Fe brown gray (inter-weathering) 3.3 In upper 1/3 platy to shaley Siltstone, lower 2/3 dk gray shale, fissile weather. 34.0 Fine to medium grained locally soft friable ss. chiefly beds .5 to 2.0 thick cross laminated. Bedding surfaces ripple marked. Ripples current type indicating EtoW movement, x12m with 15

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forsets indicating W to E (Attitude on foresets, N 45 W, 52°W overturned), Send grams well rounded. 1st ss ← Discount Yan B 8.2 Clay weathering slightly blue gray, fresh it is typical dk gray plastic. BREAKDOWN - 3.2 - Clay, dk gray, .5 Ft stained zone top. 1.5 - Clay with interbeds siltstone up to .1 thick. 3.2 - Clay, dk gray, .1 Bentonitic? zone at base .3 - Siltstone. 10.± Sandstone, hard fine grained, beds chiefly .5 to 1.5 with thin laminated ill bedding, some silty laminae or partings, light gray weathering. ← Discount 7.0 Silty channel clay and argillaceous siltstone dk gray & brown gray, weak shale weathers light blue-gray, siltstone light gray. Siltstone in beds up to 1.0 thick, lensicular, cheery in upper part. Thin beds siltstone ± 0.1 in lower part, about .5 of siltstone at base. 16.0± Siltstone, fine grained thin bedded (.1 to 1.0) cross bedding notable within channels that intersect. Siltstone beds in UPPER part men grade into fat silty shale laterally to thin this unit & increase shale unit above some resistant ledges fine SS chiefly in lower part. local discount 7.6 Clay shaly, weathering fissile with scattered beds thin (up to 1 ft) siltstone (clayey) 16

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bed of hard silty claystone 1ft from top which includes hard white, [illegible], porcelanite-like layers. 3 ft from top is .1 layer silty white weathering (pounding) bentonite? like light tea-gray clay. 4.2 Siltstone, fine grained, irreg bedded silty, brownish gray silt/brac laminae; packs dense, beds .1 to 1.0, weatherous to irreg to sterner surface, locally resistant, obscur[illegible]

8.8 3,2 .8 2,9 4,3 3,3 ----- 23,3 1,8 2,3 5,0 2,6 2,6 3,7 1,0 4,0 3,4 3,0 2,0 1,8 4,0 2,1 3,3 2,14 ----- 45,0 3,6 2,6 5,5 ----- 11,7

Morrison Section N side Bear Cr. Gap. on slope about highway Surficial material 23.3 Sandstone, massive cross-bedded & cross laminated, fine grained. Many intersecting channels. Gray, weathering buff to iron brown discont - (channel base) 3.3 Silty dk gray shale and siltstone, beds of laminated siltstone (latty carb) up to .5 in upper foot 1/2. Middle foot mostly dk gray silty shale, lower shly silty 1.6 Fine grnd ss with silty lzmnrz. Weathers with greenish cast, very hard. (Thickens along strike of adjacent channels) 1.7 Hard dk gray to black argillaceous siltstone concoidal fract. 2.8 Sandstone, fine grained, argilaceous in upper 1.5 to 2 ft. Argill. part weathers rounded lit grey blocks conch to semiconch, grades down to harder compact ss which weathers buff, + zugular. discont - (appears persistent but not much diff from similar ones in big ss below. 115.0 Sandstone, thick bedded to massive, all cross laminated, hard, fine+loc. med-grained! Many intersecting channels, ripple marked bedding surfaces. Color, lit grey, weathers buff iron brown, dk wash streaks + lithous. Some cause to cgl lenses in lower 2 ft. Cgl consists of shale frags with 11.7 (Interbedded), siltstone & fine sandstone, mirror silty shale. Upper 3.6 is silty dk shale, loc. carbonaceous with interbeds fine sandstone up to .6. This grades into massive zone of irregularly interbedded siltstone and fine ss, both laminated with some silty shale, shows interstratal deformation. Whole is dark to light + greenish grey, weathers lighter green. 1.3 to 2.8 Argillaceous siltstone + silty claystone 18

If Golden clouds be best at all times may be here. dark gray. Varies in thickness laterally, silty claystone with local thin beds siltstone grades to argill. siltstone - whole with punched conch fracture. 9.0 Interbedded massive fine grained light gray sandstone (argillus high) and argillaceous siltstone and fine ss (weths bluegray). Interbedding irreg., most common top and lower 2 feet where float fragments to slowly, shaley is to silty shale. Later dk gray with blunt cross. Altho local discont betw. this & ss below they are similar - espec. where 'argillaceous beds of this unit punch out laterally - as they do. Sandstone, fine grained to silty, laminated, similar to above & locally continuous with it, tho above has silty clay ptgs & this doesn't. Both not very resistant but loc. worth to bluffs on slope, typically laminated, with cross lam. minor, upper part pitted where clay worn out. Worth col light gray with yellow stain on some with bedding. 5.8 Interbedded silty shale, dk gray, with shaley siltstone Siltstone in thin beds highly festened, locally beds faintly hard siltstone up to .3. slope wash Above interval represents only upper part of shaley siltstone unit at base of continuous exposures end there. Supplementary section - About 100 ft along strike NW of road side exposures. Mtrs. from base of ss unit (9.0+13.0) shown above, (9.0+13.0) Sandstone 14.0 Interbedded silty shale & siltstone, as above. Upper 9'2 covered by slope was lower H:8 as above becoming more shaley downward. 19

5.4 Dark gray finely silty clay. 1/2" Bentonite? at base 0.8 Dark gray clay, with few layers of silt 4.0 Interbedded silts found with silty shale, shale. Dk gray. Siltstone in thin beds, up to .2. Silty sh at top present heavily Fe stained, red to orange. Most siltstone in upper 1/2', lower part of bed dk sh with laminae to 3/4" beds scattered silts beds. 7.2 (Irregularly bedded) siltstone + fine sandstone, thin irreg plngs of silty clay. Weathers to crumbly gray, buff + Fe brown. Not a ledge former- cropps on locally but underlies steep slopes. Trench 1.4 Dark gray silty clay, minor siltstone 9.7 Sandstone 75 in 7.2. Only upper 5' exposed lower part under wash-trenched but no good face seen. SUPPL SECTION From (1.4) shale between crumbly ss. (further to NW day strike [100 ft.] Trench 1.4 Dk gray silty shale, cl. as in 7.2 21.1 Slope with wash covering crumbly SS, some fairly resistnt ledges of same lit? ss 7.2 interval above shale. Lower 4' is fairly resistnt but just above this about 5 to 6 ft is locally sleazy, tho still siltst, & fine ss Trench 2.8 Gray? Argilaceous siltstone+ Silty clay, weathers blue-gray, 2.0 Crumbly SS + siltstone', argillaceous in lower half. Trench 4.1 Hard black shale siltstone with laminae thin beds and white siltstone & irreg blebs in upper 3.5. Lower .6 is silty brown weath clay shale.

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7.6 Sandstone, fine grained, uniform, thinly laminated, & thin bedded - both X'bedded and X lzm. Intersecting channels. Lamination distinctve, weathers light Fe brown to orange brown, color from Fe grains & lamination probably from varying concent. of sience. Minor shaley ptngs at base some channels. Trench 1.4 Dark gray to black shaley clay, very silty at in upper 3". Carbonaceous zoned, 3,0 Sandstone, similar to above 7.6, in upper 1.6 then grading thru argillaceous soft clay shale to sandy dk clay 0,4 Dk gray tabledssy clay 3.3 Sandstone, argillaceous at upper .7, & locally massive, irreg weathering, plout+ frags. Is fine grained. ? silt Trench .5 Bed of bituminous clay, fine block - (May locally pinchng out betw. ss.) up to 1.0 locally, upper part dk gray with ss interbeds. .2 to 1.6 Gray fine grained argill ss plout frags. Grades discon ? only up to bit silt. Pockets chest+sh egl at base 7,4 Massive, light gray fine to grained ss may be locally grad into above unit But loc meas, shows discont. Continuation Traced along slope thus ss aggragites about (204) with local coarse zones & strings cherl+ cal. Contact with gray argillaceous argill sandstone, sandy clay stone just east intersection of main rd with cutoff to (93) 20 Cgl SS (see above) 1,7 Soft friable fst med gr SS. grades to 2,5 Argill SS + sandy lite gr claystone - grades down to ss below 21

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Photos at Browns faculty, July 2, 1951 1. lower clk bds - Dino beam, Hazy'ss, lake color change R.B. draws it at change. 2

4,4 3,2 to purple wealth, 5,8. 13,6 5,4 3,8 1,7 11.6 4,4 shale bed, 2 1,7 1,6 1,9 2

Recorded Turkey Creek section -- and st. From top 1st massive SS, East old Mine entry. A) 32.6 Sandstone massive cross laminated fine-grained buff to Fe brown lichen- covered. Cliff former. 40.0 to 41.0 Sandstone, some shaly ss, softer than beds above + below, forms break in massive cliff 39.8 Sandstone, fine grained, cross laminated weathers buff + Fe brown lichenous. Cliff form Discont. 13.6 Siltstone, augillaceous, dark gray, hard weathers gray, light gray + Fe stained, with exfoliation locally. Fracture coach to subcoach whole is bedded, loc. laminated, bedding obscure. Preportion silt to clay varies but silt consistently higher. May be some fine ss locally. 6.0 Siltstone, hard ledge of gray siltstone recd. carb frags, Two thick beds (upper 11.2) sparated by thin bedded augill. Siltstone with 1.2 of dark gray hard silty sh at base. Base of mine entry B) About 150' up slope along strike. 6.0+ Siltstone as above, weathers orange-brown. 11.6 Interbedded siltstone and shaley siltstone, minor silty shale. Siltst has locelle laminize (X-12m) fine SS.. .2 bed sltgy grey sh 6.0 from top. 41.4 Asabove, - mostly covered/ed approx meas. 51.2 " " slope wash. May be local shaley beds on about but if so thin. 23

4,9 2,8 4,6 3,6 3,9 2,4 22,2 Skizze 16.7 ist 6 below bare

Turkey Creek R (C) Ditch along S side of gap, on slope. Dip & Strike on pretty beds N 43° W, 27-30 E Starts from base of dual SS 6.0 of other section Intervals 22.2 Chiefly platy siltstone and shaley siltstone with some beds fine SS → Sh whole illuminated to thin bedded w/this platy orange-brown, few shale beds, one of .2 ft about 6' from top 3 to .6 Silty Shale with peculiar silty bed that takes reddish brn Fe stain. 3.3 Siltstone above (22.2) Calculate Wash covered interval concealing clay bed. Meas. from shale (3to.6) to top SS bed), 27 to Strike of beds N. 43° W, dip 30° E Azimuth Outcrop N. 12° E Slope distance 25 feet Measured along N 65 W Slope angle - 38-40° wash, dirt & float deep, no bedrock reached by digging shallow holes under hard ledge. 6.1 1.1 Siltstone, light gray, somewhat sugilaceous shaley bed in mid. (1.3). 0.4 Dark gray silty shale with beaunite at base Beaunite = .2 locally but thins. belaive this zone locally cut out. (sample of "beaunite") 2.0 Sandstone, fine gr., brown w/this, Irreg. bedded. 1.3 Silty Shale 3.4 SS as in 2.0 above 24

4. 5. 21,6 7,5 6 1/3 - 2,4

R Turkey Creek C (cont.) 2,4 Shzley Clay, dk grzy plastic, locally silty beds 11,4 Irregularly bedded siltstone & fine ss, Bown to buff weath, some of siltstones mass. w weather lke gray. 1.6 Silty Shzley clay, dk gray, interbedded with siltstone. 5.0 Siltstone minor fine ss as above (17,4) shzley in lower foot argillaceous streaks throught. 2,6 Silty gray to clk grzy clay 6.0 Plastic siltstone thin irreg beds with Shzley partings & thin beds, Middle 1.5 feet considerable silty shale with interbedded siltstone. Thin bed. fine to med gr. ss at base, Fe stain. Disconct ? 7.0 Sandstone massive to cross bedded, whole cross lamin. tcol Disconform with 4.10 Interbedden fine ss argillaceous siltstone, friable, bzsol 6513 to highly silty sh, whole weaths lke gray with ss beds brownish & showing X lam. Massive X 10m fine ss weaths lke gray 6.1 to buff. Discon local. 9.6 Siltstone to fine ss argillaceous massive weathers lke gray to white, hard but crumby, couch to sub couch fracture. Fe stain on fract planes. 30,6 Massive X 12m. lke gray fine to medium gr zined ss. Med grained with white particles - trav clay? locall bones in tve form cgl of ss pellets, rounded, same as matrix. Crops as 25

2 7,8 3,8 7,8 8,0 8,8 5,4 --- 40, 14,4 73,9

R 7.5 low ledge going to slope downward as it is forcible. Obscured wash, mostly of white sand, Prob friable ss. 40± Top at hand fine grained compact ss with red stain on top bed + pitted surface the top appears to be red, flat. Sandstone, med to fine at top, then progressively coarser down, chiefly med.gr. with mangy cl stringers in lower 20' chert (clstou pellets, chert, qtzite, discograpic) principa constituents Red"silty elstu, sandy beds - Morrison. 10.8 Turkey Creek D. From Base Delt into Morrison N of road Base Delt - cgl ss 10.8 Green to Red silty clzystone. 7.8 Sandstone fairly massive Xlam., fine gr. light gray wezths with brown Fe stain ledge forming (5.6 Argilaceous ss and Sandy gray clay crumby - slope forming 3.7 Sandy gray clay minor streaks ss. 5.7 Red silty clzystone. 8.3 Greenish gray + green silty clstn 0-1 Concretionary zone - sample- Fe stone? (26oz?) 26

R 9,7 Silty gray clay, becoming an argill. Siltstone in lower 1' 16,3 Irreg interbedded Fine ss & argill siltstn latter greenish gray, ss weath. rusty brown, ss prevails in lower 8'

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Alemeda up slope above road about 1/2 way up from Morrison cut-off to roadcut at crest.

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AIN 50-19 25.8 Relatively thin bedded 4' to 10', locally cross bed + cross lam, Fine qr ss, with shale ss interbeds in lower 6'. Weather's Buff + brown - lickers like most Doltsi. [illegible] 3.3 Shaley trauelli sr/stone + silty shale. Upper 1' +/- lignitic silty clay, then silt beds silty sty + Slightly silsty + silty clay, all with plent frogs, whole weather's into gray. Fresh brn gray. 12.0 Massive, graveliam fme qr, ss, cql od base + some stringers thru base. Weather's to gray muddy streaks + splotches, 4 ft from top is 1' +/- zone liquidic silty clay - along streak & couch erect gray silty clasts comes in (25 in Jau B sect) under liq clay. Grades to cql ss below. Resembles base Morrison Cougar section. Toward crest along slope a massive loff weather ss comes in about 7' below base cql ss. It has deep crust red FeO on it, lith. between ss obscure look like lite green silty clay of Morrison type. 29

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The buff ss increases in thickness along road toward crest. Its contact with red shale below is called base Dakota along strike.

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Goldstein localities South of Perry Park -- G. says lower shales merges with upper -- so he calls it all Muddle! Boulder Morrison area -- Variegated shales always below basal cgl. -- lower shale in this area is black, carbonaceous. For 'excellent exposures' of lower shale do - Dixon Canyon Spring " " Cottonwood " " and near Atkins, Colo. Not recognizable South of Lyons. Says intertongering of red & black shales in Atkins -- Dry Creek area. Says lower shale is included in Glenceron of Colo Spgs area also mid ss which he thinks poops out S of Morrison area,

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Fourmile Creek - Road cut Pertiz section Alluvium 1.5+ Silty gray clay shale + lowmzce siltstone and thin beds ± .2 fine SS Pertiz base - Discont with ? broad ripples or some structure? 7.5t Massive, fine grained sandstone with Fe speckles, harden fresh surfaces but weatheres down - only very locally = large furrow 28.2 Interbedded sandstone + silty clay to siltstone, sandstone predominates, is fine grained + forvuinous. 9in beds ½" to 10". Shale - stly siltstone chiefly as partings but some ½ to 2" beds and one 6" bed) SS beds commonly show accords/ structure, worm tubes? + irreg surfaces Some cross bedding in this unit + most ss beds finely X lam. local discont. 3.4 Argilloceous siltstone + fine ss, irreg bedded) with interbeds of study shale about 6" silty sh with silt laminze at base. Weatheres orange brown to gray with orange br. streaks 4.8 Dk gray silty claystone + argill siltstone uniform, couch fresh on fresh upper 2.2 = Sample 1, lower 2.6 = Sample 2

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Thin Fe stained layer(?) separates sample, lower 2.6 more shelly has fissile brezh. .5 to 1. Sandstone, fine gr. dtx qizy, plant trays. .3 to .7 Gray silty shale, lower ;?t plastic shaley cley ->discount? 4 to 6' Sandstone, massive to crossbedded ? x 12m, fine grained ne??y gazytic but not across grains, wethus brown. Discount 2.7 -> 3t Silty chystone grading to silstone and sandy silstone. Mottled gray + lite greenish gray; irreg silty pockets + Fe speckles, (Sample 3) Grades to SS below. 24,4 Sandstone, massive x 12m, silty 14 upper foot. (In beds 2.4 to 12'). Fine to coarse grained, tho chiefly med., sugary hard- (is lower ledge former of Dzk.) A.4 bed of silty lite gray conch fozet. SS 6' from top. Discount (und. surf) 1.0+ Greenish, fine gr. argill. crumbly SS grading to SS 6 - 1.1 Fine gr. greenish-brown weath. SS hazel, Note [in exposure hard SS cut out up cliff + the green zone all crumbly argill SS +/- 2'. 3,0 Red, argill. SS, crumbly, grading down into silty chystor 6.8 Green silty to sandy clay 13.2 Fine to coarse grained (bess 41) sugary ss, massive, thick body x 12m coupled 33

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Note on Four mile section - could call all cream b251 chk clay sh down all one unit, ss similar clays are to, except strike color changes.

Perry Park - Section of upper SS of Dakota - about 4 mile NW of Rt 150 (Colo) 17.8 10.6 6.5 2.9 37.8 fairly hard to fivg Sandstone massive crosslaminated, fine to medium grained with inclusions of fine white siltstone (looks argillaceous) and fine SS. Grainsize fine to medium downward with inclusions increasingly more frequent & larger downward, size ranging great - small? bounded pottos to large 6"x8" blocks 3'-12'x4', Lower 4 feet locally is concord of spalls & fragments da mod-coarse X lam SS whole worths buff to Fe brown, loc. redd ish, with frzys lite gray to lite br.gray, looks like local discont. 17.8 Sandstone, massive, X lam., furzble, lite gray, gray weathering with blocky weathered surface or raised joint fillings. Some of X bedding plzins are coarse with course gr, frzy. of white argill siltst, but no large chunks or in interuzl elve. log 24 quartzite base 6' Placed surfaces (basal fot of above not exposed. 6 Sandstone fine grained, massive hard bed, with irreg lam, + siltsst laminze. lite gray, weathers gray with Fe brown splotches - locally joint surfaces stained black, descr furnish. 1t Platgy siltstone covers Block sh comes in within 10' 35

[illegible] 1.7

Perry Park - stream cut 200 + s of 150 under Dakota hogback This is weathered on sou Face - hard to tel 7.6 Silty clay shale, weathered, Fe stained thin beds 1.7 and 2.8 above base. lower ssilt upper? may be thin bent. n4 siltstone and fine grained SS, waxyly food brown 2.2 as below 7.3 silty gray clay thin lzycas silt, dk gray with fish scales near base. a2 Bentonite (Sample 1) 4.0 Silty clay with silt laminae, some thin beds siltstone

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Deer Creek section - Upper Part A (N 20° W, 55° E) Measured with stick, not direct bed to bed but close. All down to clay bed are questionable because of local faulting. 15.0 Fine grained sandstone, irreg bedded, X hum, to upper Fe brown stain, lichens + 6 to 7 feet - as above 5-6' - More platy, siltsta to shaley siltsta + ss interbedds,, w/eth lite gray. Some interbeds sandy shale. 3' Platy fine grained ss, interbedded with siltsta; 41.7 Massive x lzm bru weath fine qr, ss. discnt - 4.0 (Probably more as swell vert fault in intaruzl) Argillaceous siltstone w/inter fine ss dh gray irreg, lzm, increasingly silty to base 1.0± Shaley gray siltsta + silty shale. 3.0 Fine grained lite gray ss. worm tubes in upper part (1') lower 2', becomes [illegible] thin bedded to lzm[illegible]ed, silty lower in lower'. 1.0±? Prob. was shale here but washed out 10.5 Sandstone fine qr x lzm bru weath hard for about upper 3'. Then saddle with wash & platy, sandy siltstone, fine ss thin beds silty shale. 2.5 to 10' Sandstone fine gr@med x lzm fr v bedl w/eths fe brown to buff, lichens. A channel ss thickens abruptly along strike. 37

9.0 8. 2,7+ .9 3,5 1,4 .9 1,8 20,2

discont. 7.5 Dark gray to black silty clay and siltstone Silt occurs mixed and in thin beds & laminaze locally. basal .6 is brownish prob due to sand content which increases downward in the lower .6 + grzder into unit below. 1.0 Siltstone, beds 1 to .4, laminated to massive, locally sandy. weaths lite gr. 3.2 Shaley clayy, dk grayt black, weaths dk blue Sample 2 gran except upper .4 which is highly silty + withis lite quiz. Lower foot + leaves with bony tissue preserved. .4 Siltstue, argillaceous , gray weaths lite blue grzry 6.4 Dark gray to black silty - locally rzb Sample 3 clay, Blocky to shaly trict.. Lighter Sample 4 .5 quiz more plastic toward base. .4 Argilaceous siltstone to finess. 20.2 Massive to X bedded SS x lam. (Ho 25 or 30 loc.) Fine gr, weathrs light buff to gray Fine to med grzined local coarse lamine incl chips white weathering. 3.0 Sandstone fine, hard, platy with ripmarked surfaces, beds .1 to .6 thick. Argilaceous siltstone ptngs. Weaths lite gray irvry to brown stain. Sample 1.5 Dk gray silty clay, weaths dk blue gray in .18 Interbedded dk gray silty clay + platgy ripple marked finess + siltstone. mden? 8.0 Massive fine grained Sandstone. (6 to 8)locuts X lam to more or less even near base, weaths buff, deeperr 1.4 Sandy gray claystone + argill. Sandstone 1.0 Massive bed fine gr, buff weath SS. 39

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1,6 Plastic clt gray clay in upper .8, remainder Samplo silty clay to claystone, couch forzet woaths grzy to lite blue gray. few inches argilli Siltstone at base. 2,1 Sandstone, fine gr as above (1,0) sample 1 1,6 Silty gray claystone locally some plastic clay, 2,5 Sandstone, fine gr. as above. 1,3 Interbedded argill, finess + siltstone in beds up to .2, grades to clay shale below. sample 8 1,7 Shzley finely silty plastic clay, clt gray woaths blue gray, argilli, fine ss + siltstone. 9+10 .3 fissile weathering clt gray to brownish (near base) 5, 8 silty clay shale., weathrsclt gray, 2,0 Argill siltsta some interbedded silty shale weaths lite gray discout Note. The clay bed above is in a channel incised in the underlying ss.- It pinches out completely up dip. comece ca - the thin shales Locally has beafornite at base above zlbs thin bot not all punch out. 53,0 Fine snd medium grained massive to x bedded, x lzm szudstone. Hard, lite gray woaths, dk gray to Fe br. lichenus. pricipal ceprock of moab ck - both sides d geo cr. 5,5 Continuous with unit above but has 39

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zones of coarse to finely cgl ss and clay conglomerate, also weathers buff to orange brown 3.5 G Siltty shaley clay with thin interbeds t- laminar siltstone.- Weathers fissile lte gray 1.4 Platy, shaley siltstone,micro silty sh. 2 of Siliceous lt^e gray flint clay. 7 deg base parallel h 2.0 Dk gray finely silty plastic clay grading downward to silty brownish clay with silt laminae 5.5 Siltstone interladded with silty shale beds of siltst up to .3 most thinner. Dk gray where shaley to lite gray or Fasting where siltst. 2.8 Fissile silty sh^t shaley siltstone, dk gray weathrs lte .4 Siltstone irreg phts fine ss, solid bed 1.8 Fissile silty shale, dk gray. {21.0} (ss to dense siltstone, loc argill.) Fine grained, Massive, thick irreg beds weathers buff, splotchy, with Fe,Mn stagn on surfaces. 1.0 Argill. siltstone grading down to silty clystone 1.0 Dk gray^ fin^(y) silty clay, with 1/3" bentonite at base 1.0 Siltstone and silty dk-gr claystone, 3.5 Argillaceous silty shaly fine gr. SS, massive to irreg bed, weathers rounded dirty brn gray 1.2 Silty clay stone & arg. siltstone gray 1.0 Argill. siltstone, hard

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6.4 Siltstone, shale and silty shale inter bedded. About 16 above byssos 3 of flint-like soapy) between pore + bent, 15.8 Hard massive fine grained SS, Fe brown wraith, local discout lichenish. Fe speckle. 12.7 Shale intercal - covered by blocks SS, no complete section. Juddles, interbedded shale & thin silts! A fine SS... Clay (or sh) clt glue gray > 14.3 Sandstone, irreg thin bedded & lzm, x bed locally. irreg. interbedds siltstone. Gioss hounded irreg streched outcrop. Below upper 10' clay + some fluds clay flake cely, course ss + plus Alternating harder layers + softer with hewder layers festomred, softer buty to gray + pitted. As above wraith " " 15.7 Medium fine to coarse+aplastic SS 5.0 ? massive x lzm. & x bed, wraiths buck 20.0 lichens. 6 Question here es to positon of disconf + bzso Sa Plaitte. 41

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Golden Fire Brick Company - Mr. Mueller Holdings see plots. Mr. Mueller - Hogbach N plant good, Denver has slice. Dry Creek Mue at Von Bibber's reserve. Old mine clay left. Stop mining. Five clay vein - us 2xl 12', to north Common plastic clay Brick goodsh PCE 32 50' 55 6-8 burn plastic? ? -> No PCE available Burnin? Grades down out from hogbath. Blue vein Blue ribbon chen 105 21-22 Ruppale Gd 8 Buna for red clay 27-28 1947 PCE Blue clay - on calcined blue Cone 28-29 2960 F. (All tests Mellon Inst. of Industry Research) (Von Bibbers) Dry Creek 33-34 cone - this is highest test obtained on the Blue Ribbon vein. Chemical analysis of scrap brick. Mellon Inst. Silica Alumina FeO Ti.t. Lime MgO AlK, 59.90 35.49 2,37 .1,10 0.25 0.25 .61 PCE 32 1/3 - 33 99.97 #1 Golden Stiff Mud 42

Pres. American Refractories Institute W. J. Westphalen, Pres. Railroad Exchange Bldg St. Louis, Mo. Formap. 1943 Refractories plants of the U.S. Published by J.H.H. Muirhead 230 W. 108th St. New York NY, Copyright 1943 by Muirhead

Chem Anal. on Brush from Laramie CLay- Silica 75.89 19.08 2.21 0.56 0.22 0.26 1.40 ___________ 99.62. DFC Co - Manning narrow vental crucible clay - west of Blue ribbon - Coois uses same from hogback E of Mt Vernon Canyon: Black silica. F.C vein Rm North Loop is NA South - not in commercial quality, till Roxbury Pk.

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Supplement #1 to Morrison section Bluff N 35° E of Road intersection Dark gray silty sh layers siltstone 12.5± Photoy, lowm. ss pink-ur dark red weather, 18 siltstone + slly siltstu - 6.0 Frizzle siltstu + tmc ss. 15.0+ Fine to med gr l/t gray to white sandstone with chips and blobs hght-gray-white claystone, occasnal rounded chert pebbles in upper 6'. Then about 3' argillaceous ss, weather's out soft with blocky to subcouch fracture, then remainder is less argill., frizzle, whole is massive, x lowm. stones/pegs and inclusions? of chert common in lower 10' white clay blobs througt. Weather's gray with bdf/orange + loc red Fe stain also with knobby Fe couds. Chert looks indigenous to ss, (striktr) slope wash Laterally (to S) along slope the 3' argillaceous ss zone turns into sh silty-gray cloystone + forms bench in mid of the ss. (15.0 above) Section of this feature ss, med+ fine massive lowm w/cq plat/kerys loc. dk gray discout 1.5± Argill siltstu., -red to orange weather. 4.0 L/t gray silty- sandy cl(Stn Fe pet specks througt 1.5-2.0 Hard red stained Fe cement ss as below. ss as in lower 6' above Looks like - 1) Occassional pebbles zrc above crStn zone 2. Chert below it. 44

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Further S along slope - SS below erqill zone is about 14' thick. On slope above church: 14'+ lower part of SS - chert stringer bed 11.0 Wash covered slope, [illegible] shows fine grained friable sandstone weather orange, Fe stain. May be argillaceous. Grades down into interval below. 6.5 wash covered trench shows zone red argy/llaceous SS + sandy (?) siltstone at top - red may prob be secondary, below is 1" gray sandy claystone with coarse spot red stained. lower ½ part of interval obscured by slope wash. 11. Chiefly fine gr SS with Fe blebs in lower 6-8 ft weather to pitted surface, some siltstn in upper 3' sandy obscured + Fe-stained zones of finess + siltstone some with Fe blebs BB shot size. Local good intrefm. Cq1 of silty clsta chips in finess & siltstm. Lower 1" obscured - looks like grew, weathered silty, clayst with linear fine SS 15' Red silty claystone with mottles: purple + green in lower 6' yellow at very base where weathered & altered. 5.8 Sandstone, Fine gr, Fe specks massive, buff with pink cast. xlam.' Locally weather - pitted 45

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2.6 Red silty to sandy claystone 2,5 Fine grained sandstone (red stone) along shon argill content, some bleached zone at top 1,0 Red silty claystone 2,0 t Fine sandstone buff, pitted to pinkish. .6 to 10 Red silty claystone 10.0 Massive x bedded ss fine grained in upper 4" then becoming medium with coars & cam, and containing zones fine ss, even silty giving irreg banded appearance Locally weathers pitted, some zone few coucs & blebs ( less than .1) stained pink at top, red weather like gray, with local pinkish buff. arcuate toe 3,0 Red and green silty claystone & argill. siltstone. 6.0 Massive fine grained, ss similar to above (10.0) weathers pitted. fine Outcrop. (locally truncates bedding below at low angle. Note - Pys red & green silty claystones come out within these channel sands and really the shaley beds noted above pinch out. 7.7 Green to gray and yellow weath. claystone & silty claystone with local red puffs. 7, to 8. Fine to med & coarsd massive x lzm ss sand cgl siltstone. weathers like 46

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gray to buff, locally pinkish. Coarse + clay layers include chert + quartz etc. frag., also intraforma clay pellets locally. Much Fe stain locally, some in blebs from 1/4 to 1/2" in diam., locally concentrated in concretions up to 3' in diam. Locl pH bed worth, cyl local discoal fractone base common 10'+ to 4'.0 Brown to red silty clayey + silty clsty local lenses hard fine ss in upper foot. 13 to 15' SS - fine grained massive x laminated wealthy buff with pinkish zones + local pelleted zones. > bed bottom. 19' Claystone (mudly?) about 1.5 to 2.0 of gray at top, then maroon 3 to 4 feet best gray grading to gray - all gray in lower 3'. 2.5 Concretionary? zone of argill is? test Gray weather like gray to cream with orange Fe stain. Coarse fracture. No bedding, wavy sulfide thrust. 3.5 Dark gray claystone, hard with white flow specks + some calc flecks silty + greenish in basal 1.5 5.7 Fine grained SS buff to fine brown weather, eroded at top grades up into claystone above. Is massive. 14 Slope wash on gray-green claystone, no hard beds. 9.1 Concretionary layers 47

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40'+ approx. 14'+ Dense green & gray green siltstone with as well zones + 1'x silty bright green claystone at top Weathers coars. to sub coars. frocture lite buffy lite brown. 48

Alameda HZ (41N 50-19 @) From crest of hogback S 80°E from Alameda Hwy-Morrison intersection start, then continued south from there on slope 4.0+ (Lower part only) Medium gr, cross laminated + cross bedded Fb brown to orange weathering, lower 1'+ has intraform cal + local rotten fine chert pebble EqL. Disconf. 3.7 Clogstone, silty, with interbeds siltstone on lower part. Some finely silty plastic clay 2.0 +26 SS, plclay, laminated with ripple marks on bedding surface. Fino grzined, weathers gray-buff-brn 1.3 Shzly clog st + top w/siltstone bed impreg w/ Fe, below and basal bed biotauric? clgy + bent locally a porcellanite like layer, 2+ Fe siltstone is local, dry nearly on fe ore locally. 5.2 Sundstone due to siltion two massive beds in upper 2,4 then platy and silty with platy siltstone minor fine SS at bas.-grade 14.3 Szdstone, fine grzined, massive, irreg, bedded weathers gray, buff upholster lichens. Dissant. 8.6 Clgy, black, silty interbedded with siltstone in upper ½, plastic silty brown clay grading to ergrill brown siltstone 49

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30,0 Light gray to white fuccar SS Massive to array ledded cross laminated, local erry beds siltstone discord. 12.3 Clay, interbedded with plates, siltstone, no good exposure, weldtures slope, Bentoute about 4 ft from top - good one, siltstone weldturs Fe brown. 22.3 Fine grained SS array, interbedded with zones siltstone & argell, siltstone, gray white, weldts, gray to white with local fe stin zones, 24' Argill. siltstone with interbidds silty clay, 10 to 14 from top. Massive siltstone, 5'7 from top is .2 of Bentoute, upper 10" flat beds of fair clay up to 1' ± lower 10 feet - siltstone, plzfrq, shylen pts grading tr SS below. 6' from base un then 6"-sineclay & bentout Next interoz( was to SS previously, measured),

1 1,8 2,5 1,0 1,3 R shly ptnqs lower ft 2,1 2,8 .4 1,1 .4 3,4 15,8 1,5 2,7 4,5 1,6 1,2 1,6 4,3 3,7 1,6 3,3 1,8 23,8

MO 563 Plainview section Measured by tape from exposures in railroad Cut of D & RGW beginning about 1200 feet North of the crossing at Plainview, in the NE¼ NE¼ sec 12, T2S, R.71 W, Jefferson Co. Colorado. was 41' 17.0 Interbedded fine ss siltitey with pbbstce f clay, jelly to to 20' slowly minor good beds. ss in thin beds .6 + 16.0 Sandstone, medium to fine grained, in massive beds .2 to 4.0. In Upper 5' more massive x 1cm. Below this beds thinner with finer grain locally siltstoue. + Shelly parting progressively more plentiful down ward. Bedding surfaces of the lower part are full of worm casts? Bedding surfaces of most of interval are ripple marked. R=521 .2 to .6 is life gray very plastic clay with thin interbeds ss [sample 1] This is same type cley as interbedded with ss in lower part of this interval. ss in upper 5 to 11 ft weather buff to orange brown. Lower thin beded part into gray weath. brick off 24.0 Sandstone massive x bedded medium grained x 1cm. weatherous red-brown, ridge maker. 51

shots cg! closeup " " away lower, lb red leads cg! " " channel base Perry.

Local zones of Fe blobs BBergt, bedding surfaces ripplemarked & locally pitted where rounded fist pellets clay & plant frogs weathered out. Discont ? 1.0 Sandstone, fine to med, irreg, bedded in thin beds .025 - .3, locally heavily silty) + Fe impreg. Some layers argill + lite gray wash, others not argill + Fe red & br. wash. 2.2 Sandstone similar to above irreg, interbedded with thin beds gray, fissile highly plastic clay shale. SS beds are chiefly fine gr argilaceous with worm trails on bedding surfaces. Upper .3 clay = [sample 5] 5.8 Sandstone, medium grained, thin bedded, x bad + x (2m in upper 2.0. Lower part massive x 12m. Weathers buff with reddish stain splashes. Upper 2.0 has paytings. interbedded, softer SS. (This unit thins locally 3.0 Interbedded argilaceous siltstone with | shale .5 Shale is sample 6. silty shingle, chiefly siltstone with one .6 bed of clk gray shale* 1.5 to 2.1 from top. Weathers light gray, # .5 bed Fe stained finess at top. 6.2 Shale, dark gray silty with interbed argilaceous siltstone and siltstone laminae. Locally has conc of pyrite siltstone Basal .8 Fe stained siltstone fine SS interbedded with shale. Samples 2 TOU 3 4 feet approx 3 beds * has maroon streak 52

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4.0± (locally about 1) Sandstone massive x lam. conglomeratic, med to coarse w/ht scattered pebbles of chert + quartzite up to 4.5" Disconformity, Lytle-Glencaine. 4.0 soft Argillaceous siltstone + silty clay, greenish but light gray weathering Bed of dense brick red weathering Sandstone in middle part, other red stained zones locally present. 3.0± Irregular lense, of argillaiclaled to massive To attenuated ss., interlayered Fe brown. Locally cuts out against ss below 2.0± soft Argillaceous siltstone and silty clay as in 4.0 above, with some red stained silty streaks. Discon?. 22.0 Massive cross laminated medium to fine? quartzed ss with zones coarse grained, whitish on fresh, buff weathering w/ht some black stained surfaces. Local pinkish cast. Varies consid. in thickness. Festined red brown zone about 1.6 to 1.0 at top. Discount [15.0 (thins 1st)] 2.5 .2 to .20 Silty clay and claystone w/ 2 few local lenses hard ss. Upper 4't greenish, some red mottling, lower part red. Lense redish or weather fine to med ss Red siltier claystone mottled green (as above 15.0) Note: this interval varies with chness & ss lens in position. 19.6+ Massive med grained ss w/ht coarse + cgl zones in lower 8' Weather Fe brown, locally stained red by shale above 53

1.2 1.8 1.6 1.7 1.7 2.2 ------------------ ,2

Desc 4.7 Siltyclstn w/zoqll siltstone (at top) upper, 1' green, rect red, greenish to yellow grades to unit below 1.0 to 5.0 Interbedded Siltstone and silty claystone Siltstone in beds 1-3 thick, yellow-buff+ orange with, dense brown argillaceous, hard to friable. Clayston chiefly red) greenishclay some highly silty yellow. Locally (N side Tracks) only 1 siltstone bed 1'+ in this interval 9.0+ (Meas where interval above only 3'thick) Red silty claystone 8,2 Sandstone with interbeds greenishclay claystone. Upper 7-5 strictly hard beds are chiefly siltstone, argill, about 4 thick, then black, tests fine gr ss due with clay interbeds, locally cal or eufor ss beds merge. SS weathers buff to Fe brown, local red stain from Shale above. Local lenses sand ss with basal check pelible cal, (see with tracks Desc 4.5 to 10+ Gray to greenish silty claystone and argill silt. Soft sand in lower part swells some resistant the beds ss. Locally (S) tracks) interval is a channel fill w/alt bed of red I green grays & yellow silt, & sandy zone 5.12 7.0 4.5 to 10. Where 4.5 to 10+ is thin ss above has cal, coherent, ss that now is fine. 54

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7.0+ Sandstone, friable massive buff weathered Fe speckled, fine-med-coarse, rounded, Discout. 11.0 Silty clay w mottle, red + green \ 7.2 -> Clay, silty, gray to green Upper 1' concretionary silty claysone green to gray Fe weather, red gray + green silty clay, 5.8. 11.1 2.6 3.3 5.9 [18.7] Sandstone, upper 5'8 fine gr arkstlkaen locally silty at top; some 1/4 claystone at top. remainder conglomeratic ss and cal. Constituent include chert, quartzite. 2nd clay fragments 3.0 Green claysone wash and art. 55

Golden Fire Brick HA. Piece section of seed hog bckch between DFB Co drop and XG FCo fence. From west well quarry surface - main fire clay bed 4.0 Upper 2.5 is argill siltine Cap on top 1.0 then 1.5 dk brn grzy Silty clay shale, 1.5 below is, fine gr-ss. 1.0 Interbedded silty fno creysh & thin silty sth 462.5' Upper 2.5in dk gray fissile wath. cl. shale lower part obscured 1.0+ Hood Fine gr. SS, buff wealtruing 8.5 Obscured), chiefly shale mixed in few thin siltine & fine ss bed. 18,0+ SS, Fine to med gr. interbedded X clay X lams. some underbeals Siltine. 57'approx. Obscured - upper part same shale with 22 mers. "bentonite 1" from top, about 11'+ 25 below contact is float zone of red 10 (Festonite & impreg SS) between clay) top Bentonite platy fine gr. SS + proof lower interbedded chr. crest 20'from red zone to platy ss ledge PS. 56

43,4 16,1 33,3 87,0 33,3 43,7

8/3 13' Sandstone, fine to med gr, 1cm. to thin bed x bed x lmm, ledge former, To brown, weathered to orangebrown. 16' obscured- approx means, shale unit? 3,4 Platey, fine ss with ptings siltstur plant frogs. 4.0 (approx) shale slope observed. 1.6 Massive fine to med ss, coarse to loc. cq! scattered pebbles. ? 2.4 silty clay, Shale with interls sands, approx. grey - Obscured 41.5 Massive fine to med gr, ss weathered brown same blocky flams) 2.7 7 Gray to dk grey silty shale 1.3 TOP H. Here bedg ss + lite grey couch fragment silty clastn grading to sudge+ to [illegible] below. interval 3.2 FM 3.2 FM 37-85} Sandstone fine to med gr, massive x 1cm weathered gray. Few coarse csts, minor int ro form cq! 10+ Obscured silty cl + clsto, prob some in turbid ss. 8,3 Massive, X 1cm, lite grey weather SS stronger sheet patr cq! Med to course 17,0 Obscured) 4.0 highly cql Massive V-lam ss. wash 57

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Golden Fire Borets # B -- A type measurement downslope from base of clay under uppermost cgl bed slope at + bedding here is direct measurement possible. cale du 55 50' 3' ooocoo Across our highly cgl ss at base section A, 53' comes to first heavy bed of cgl in the SS. From this bed, I G1 approx to top of green cgl which is 11' thick here but at deepest part of local lense is about 23' + co 205958

Deer Creek #2 From base of crest-forming SS north along hogback (seemap) Here the SS(owe below fire clay vein) is equally thick as in DC, #1 - Sheer cliff 50'± then parting to local loose .0-3.0 of silty clst+ interbedss them 3 to 5 feet of SS. The lower part of upper cliff of 50' is full of coarse to finely cyl SS & if cyl. Discont. Shale silty dk gray to dk brn gray, weathes fissile, blue gray, to lto bluo gray, has interbeds siltstone 3.0 with siltstone, augill. + lb silty sh. with silt 12mm zo 4.0 Silty shale, 12m ruse Silt. .2 Brctanito?- see sample [Sample 1] 1.0 Silty br qr clay .2- Bents 3.0- Silty dk sh siltstn 12m. .4 Fine Fe stained ss. (3.7) LB. Silty, 12m silty sh + siltstone layers. 1.5 Siltstone, reccitant color, Fe stained wavy bedding to platery, weath black stain 4.0 LB silty clayer sh+ siltstn with silt 12m. 0.6 Sandstone, fine gr hard silky ledge. 3.0 Dk qr silty sh., thin beds silts in ly 24.6 mid + lower part [17.2] Sandstone fine qr, silty massive, irreg weathering lte gray. Some zones chiefly siltstones. Minor Fe stain [2.6] Argillaceous siltstone + fine ss continuous with above - just mild soft 59

10.0 argill zone of some. Interbedded silty ss as above (77.2) and zones argill siltstone fine loc containing dk grey layers of silty clstn upper 2.0+ fine gr SS, reluctant. 0.9 Shaley zone at base interval above. 0.3 Silty grey shale and 1b argill siltstone 0.4 Bontomitic clay? [Sample] 0.2 rosly wezth silty sand 7.5 Sandstone massive, fine gr Fe specked to crumbly, wezths orange brown. Fe pgs study sh. 3.3 Silty dk gr to bl shale, upper 0.3 shaly siltstn. 7.2 Ib silty grey clay + thin beds grey argill s, itstone. 8.0 Ib siltstone and silty sh, observed, siltstone predominates. 3.0 Sandstone massive bed of med gr lite gr to bot wezth 4.7 1.B, argill siltstone, silty clay, study at top. 1.4 - silty + sandy cl + clstn .3 - argill siltstn 3.0 - silty sh + argill siltstue. whole lite gr to lite blue gr wezth. 7, 4 Sandstone interbedded fine argill silty pltey to finish lam and massive med to coarse, 60

discount. x4 Femoss 1,0 sh. - this is not black but a cay lite gray silky clstu. See Hbk 6 p. 29. (18) for location discount further down on hugbart.

Breakdown. 2.0+ Massive hard med-course buff white X lum 2,4) Plutery slown zone, Doc XLum Ft stained wron tub 1.0 Massive med-coarse slatey 2,0 Lam. zone gradng to ant below 10.5 Shelo, DK grey to black, silty, fissile upper weth with 7 fca beds 2vqill. Siltstone 8.1@ t thick. Single-m Lower 4' harder blocker more fissile 3.5 Sholo zs above with beds siltstn common + one hord finegr, ss 0.4 thich about 1.0 above base, data 1.0 sh siltstn. 23.5 Sandstone, massive, med-course cqlom. Light grey, to lite buff, cliff forming locally, lichens. The cq? mostly in bszl 10' bet stringers throught Marked unconf zt base. Cq! mostly Chart qfgst+-clstn, some pebblec up to 0.3 diam. These usually iso/2fed + not in bands of pea size stuff that is most common. Unconf Slof. 7.0 to 9.0 Siltstone, argilaceous silty clsty Grey weth., conch fract, with beds fine argilli Sandstont. Breakdown 6 to 1.6, argill siltsth. 2.0+ or above with beds argill fm ss. 5.0. Silty clsta grey with green coit. and red mottling or swin in lower part.

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3,0 Sandstone, fine gr., massive weather orange brown. is heavily fossilpecked, Basal +4"s argill siltshm parting 3,14 Sandstone as above, bigger fossilpecks, locally pitted, same mud etc. Disconfl. 5,0 Silty claystone + argilaceous siltstone with bed hood about 1 light-gray finess 2.0 from base. Claystone above are red, below-gray, chiefly gray/tan along strike. the red claystone thins locally to 6/± with 1"green at top 12,8. Sandstone, fine to medium, variable in thickness. local silty zone at base & top. From 4 to at least 15" thick in 100 block. Disconfl. 6.5 Silty claystone, chiefly red some green mottled top & base Gastroliths in upper 1/2 8.5 Sandstone massive cross-lamin, fine to coarse with some aggl streams and red Jasper frags, under pea size at coarsest. Disconfl. 25,0 Alternating benches silty claystone and ledges argill siltstone, chiefly gray and gray well silty layers yellow-green & grey weather, minor red mottling really in low percent 13.0 Massive argill siltstn + fines ss red to green stone. 15,0 Silty claystone, +argill siltstn, red 62

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minor gray at top 8. Massive argillaceous siltstone and fine sandstone, pink, red, & yellow-gray, grades to interval below. 36.6 Sandstone, upper 15' medium with zone of argillaceous silt stone base, then remainder med to coarse & conglomerate with good coal. whole massive, wealty pink to buff basal 5 to 6' locally beds of solid cgl. Below typical green Morrison beds 63

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Lee's correlations Obvious that - 1. Lee did not find his lower shale and lower & middle ss easy to pick out in Denver basin area. 2. At Turkey Creek he put upper sandy part Morrison as his lower & middle ss of Dakota. At type Morrison he was confused and had to misinterpret Eldridge to make his idea of section fit that of Eldridge. Actually, his lower ss, lower sh, & middleless correlate with the upper sandy part of the type Morrison. Assuming his other correlations correct then - Type M. Eldridge Dakota { Dakota | Dakota Glencan equival | Glencan Upper sandy pt} Morrison | Little Ralston Also - the sandy upper part type Morrison = Cloverly and Lakota - Fuson. Fall River is prob ss that is only 10' ± of type Morrison area + sits on sh. overlying basal Det cal. This ss thickens to north + is t 60 at Eldorado Spgs. 64

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(Canon City trip with Ruechtel (July 23 thru 25) First stop - Skyline drive. Observed sequence same 23 as that in Denver basin with Glencairn member basal cgl. on Lytle. Base Lytle cgl. Lytle locally picks up green claystone interbeds. Glencairn has ss like the platy ss under shale #3 and a thin shale zone between it and the bszl cgl. Also looked at Grenados, Gocenbarn, Czuliste & Niobrera 24 Morning - Stone City, Codell & Timpos on rim across from Dry Creek C. Then exposures in Dry Creek Canyon & Spring canyon. Afternoon - Rock Creek - in slope mine to see thick clay. back thru Beulzh, Florence 25 Morning - Oil Creek Section Lytle-Glencairn contact on 115, this exposure also shows red beds locally in Lytle. Type Lytle - brief look from distance. Type exposes only massive sandstn. + cgl of section is poor as no Contacts shown Colo Spas- Garden of Gods- Dakota pzvt. Faulted out locally. Back to Federal Center 65

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Belvue trip - with Knechtel July 26 Stopped at 4-mile section - no bszl Glen cd l. Stw type Lyons, + Jelm(?) and Entrada (?) along St Vrsin Cr. May be section top + bzse "Dakota" in this area, Belvue section of Lee along irrigation ditch. Excellent exposures of most of section, Glucziwn fossils. No bszl cgl see Ditch will be dry by mid. August 27 which time section is det'l. Owl Creek canyon - Poor exposures, no place for section. Box Elder Cr. - Fairly good exposures of upperss part upper Glen, Graybull equiv, bzsl Glen cgl, the Lytle + Morrison - worth 2 section. Spring Canyon dam site - Excellent exposure of zl but lower shaly part Glen above Graybull equiv. Section. Check Dixon & Soldier canyons to north, which have also been dammed. Sections to be measured in summer Belvue (+ sample) Box Elder Cr. Spring Canyon 66

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Finlay (1916) = Lytle and Glencairn Lytle- Page 8, The Lytle sandstone member, which is named from Lytle in the valley of Turkey Creek, consists of sandstone and intercalated beds of grit and shale. Its base is generally marked by a coarse massive sandstone 15 feet or less thick composed of prevailingly siliceous white, yellowish-brown, or bluish grains. The average diameter of these grains is about an eighth of an inch, but the largest fragments are an inch across. In some places, as near Colorado City, the base of the member consists of fine-grained white or cream colored sandstone 100 feet thick. The Lytle member contains pebbly beds at several horizons and scattered lenses of greenish or reddish clay near the top. The pebbly layers, which are separated by beds of fine grained white sandstone, are abundant in the uppermost 50 feet. The average thickness of the member is 145 feet. Glencairn page 8 The Glencairn shale member, so named from a tract of land a few miles north of Lytle, consists of dark shale and a little sandstone and is rather sharply separated from the Lytle member. The best section is in the railroad cut near Bear Creek. The base of the member consists of 12 feet of purplish-black shale, much cracked and broken, having veins of gypsum, the largest a quarter of an inch thick in the cracks.

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The succeeding 18 feet consists of grayish sandy shale with layers of fine grained gray or yellow sandstone an inch thick. Above is 40 feet of purplish-black shale like that at the base, succeeded by 15 feet of drab clay. About 110 feet above the base is a bed of friable fine-grained, achre-stained sandstone 18 inches thick, overlain by a few feet of light brown clay. The uppermost 25 feet consists of paper-thin layers of purplish-black shale with gypsum filled cracks. The member attains its maximum thickness near Colorado City where it is 145 feet thick, but in the southern part of the quadrangle it is much thinner and in places measures less than 10 feet. Dakota - Shows Dry Creek Canyon member present in Bear Creek section - which must be good'. Richardson (1915) - Recognizes Purgatoire and its members in Perry Park. Does not separate members as 'exposure' too poor. Glencairn equivalent apparently chiefly shale as at type. Stose, (1912) Purgatoire formation. - The Purgatoire formation, (p. 3) which is composed largely of sandstone, was formerly regarded as part of the Dakota sandstone and is so 68

Possible outline. Intro. History Physical description Suggested terminology Possible correlation with other zones. Proposed terminology for outcropping

mapped in the Pueblo and Welsenburg tulios. (On history of separation) The formation takes its name from Purgatoire canyon in the Mesa de Maya quadrangle. Goes on with page of detailed description that shows some difference with Glencirrn-Little sequence, but gets what appears to be Glencirrn cgl. with fish remains in it. Possibly one section would help tie this in. Cloverly - See Wilmerth. (Original description by Darton 1904) in G.S.A. Bull. vol. 15, pp. 394-401) SEE CARD FILE See also Greybull sandstone member 14 Wilmerth. This is probably the basal Glencirrn sandstone. 69

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Leremic ① N18°W, 56°W overturned Glencorm ② N10°W, φ Fault ③ Trend N67E ±↓ 70 14

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UPPER 50-100 MIDDDLE 150 Pet Group Lower 40 20 Dzhoz 2 S Gleicziya B? B? B? 93194 ytle

Upper ss Md sh Mid ss Lower sh Lower ss Newcastle Shaker Fall River Fuson Lakota

" " " " 10. 9. Spring Canyon roadcut Jeew: Entador? square area 8. Looking west Bexdale and top rock for top lightlands The 2 pegbacks 7. Bexdale Cr, N. side out on rd. hill farm W on 6. Jein Morrison hythe 5. Morrison rented 4. I. Sh. 3. Graneau sqawm; Meddles & Lowersh 2.looking W thru cut, 1. View with just's Bostand. 2 thru 5 - Boddine footth 36 oyr Rd #

Van Bibber Creek Duplicate section - upper part of [illegible], face in N end of old workings. - Sandstone uncout. clay beds .6 Silty s[illegible] argill. siltstone .8 Dark gray silty clay sl[illegible] -> shly clay (Sample 15) 3.9 [Discou] Sandstone, hard, lightgray, finegrained cross.laminated, weathered lite buff to fe br. 1.2 Dark gray argillaceous siltstone, grades laterally into silty clay (Sample 14) 1.2 Siltstone, gray, argillaceous 1.2 Sandstone fine gr[illegible], hard x lzm. Discout worth, buff to brown. Sample 13 { .8 Gray silty clay (indurcted { .6 Argilaceous siltstone gray { .8 Gray silty clay 6.3 Sandstone, Hard fine gr. x lzm, gray, buff to fe brown. Beds 4" to 2' thick 2.8 Clay[illegible] (drawn through), locally silty upper feet D base, shaly, silty thurce (Sample 12) 2.0 Sandstone, some infabed. clay in upper part. Fine gr. platery locally beds to 10" thick. 1' Clay - Gray clay pl[illegible] frags, silty layers, fe stzmin 0.3 Sandstone = 3" bed over main clay. 74

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