Field Notebook: Texas 1957b
Page 81
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Transcription
(Sect. 32 cont.) see pg. 52? [Section measured in two parts, upper part here p.124-125 and lower part from middle of p.126-127-128.] Top of ridge, gap were road passes on top [This part = Brooks Ranch Mbr]. 36) Limestone, drab gray weathering, medium brown-gray on fresh surface, (Lenses of yellow limestone also), fine grained calcarenite with abundant fusulines and some gastropods. 15' (2' beds). Collection 8/6/58/1 near top, Collection 8/6/58/2 middle. 35) Shale, green and dark, 6'. 34) Limestone, weathers yellow-gray to greenish-gray 1'-4' beds, calcarenite with much silt, bedding is uneven, has conchoidal fracture, contains fusulines and some smaller fragments, and gastropods; "shale parting" are drab siltstones with some clays and many fusulines, all beds quite lenticular. Collection 8/6/58/3. 27'. 33) Alternating yellow siltstone and yellow weathering limestone. Siltstones 2' to 6' with abundant fusulines near base, gradational lithology with each underlying limestone. Limestones are dark drab color or fresh PG. 125 surface, weather yellow. Top unit is drawn arbitrarily at a nearly rubble zone 1' thick in road cut. Collection 8/6/58/4 (20') and 8/6/58/8 (at base) 33'. Sh 9/5/58/1 32) Shale greenish-gray and sandstone, greenish to brownish-gray - lenticular cross bedded some flow-rolls, 25'. 31) Sandstone, yellow-brown weathering, dark gray-brown on fresh surface, persistent unit - 2' (limy). 30) Shales, varicolored, red and grays. 21'. Collection 9/5/58/2. 29) Sandstone, yellow to brown weathering, 3' persistent (limy). 28) Shale, varicolored and greenish-gray sandstones, lenticular and cross bedded. Alterations of these 2 lithology about every 5' to 10'. 37'. Collection 9/5/58/3. (from p.126). PG. 126 ? Fossiliferous band in red siltstone zone in Hess conglomerate along east fence of Moore Ranch? Collection 8/6/58/5 - Word outlier in Falcon Ranch - This is about 20' above Word Conglomerate. Collection 8/6/58/6 - about 1' above no.5 Collection 8/6/58/7 - few fusulines and tetracorals from bed 12 Sect. [32] 37. [Base of Brooks Ranch Mbr of Lenox Hills Fm] 13) Hess Conglomerate - Calcarudite, light gray limestone cobbles up to 8" diameter. This unit thins and thickens a great deal. 35'. 14) Covered, greenish-gray shale inpart - 9/5/58/4 at top; 47'. 15) Limestones, light brown-yellow weathering, light gray fresh, vertical splitting on outcrop, bed 6-10", 8' dip 7°, N20W. 16) Covered 2'.