Field Notebook: Texas 1957a
Page 218
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Transcription
<-- 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