Field Notebook: Texas 1957b
Page 13
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3) Shale, blue-gray with some brownish stringers, becomes more sandy upwards, very silty throughout, 67'; Collection 8/6/57/8. 4) Calcarenite, has dark-brown color fresh surface contains brachiopods, crinoid stems and a few fusulines (Paraschwagerina?) 2'-2.5'. 8/6/57/1. 5) Sandstone; light brown; has a tinge of green 2'. 6) Calcarenite, like #4; 6". PG. 13 7) Siltstone and shales, brown to light brown, 2' exposed. 8) Covered, 25'. ~133', Top Lenox Hills Fm. 9) "Hess Conglo", calcarudite, Boulders 4' diameter nearly all limestone, little chert or quartzite; massive 44'. 10) Limestone, light brownish-gray, well bedded in 1'-4' beds, lower 6' contain brown chert and quartzite pebbles; 26'; Collection 8/6/57/2. 11) Conglomerate. 1.5" to 2" chert and quartzite pebbles - 0' to 2' thick. 12) Limestone, light gray weathering, dense, no good bedding planes. 3'. Collection 8/6/57/3. 13) Conglomerate. Chert, quartzite, limestone; all well rounded; up to 6' diameter. 17' thick. Collection 8/6/57/7. PG. 14 14) Sandstone, medium brown, very silty, 5'. 15) Calcarenite, medium to coarse grained, dark gray weathering, fetid as are most of these limestone. 2'. Collection 8/6/57/4. 16) Sandstone and siltstone; light to light orangish-brown weathering. 19'. 17) Calcarenite and fine chert and quartzite conglomerate pebbles, bryozoans of many shapes and sizes; sponges (?), a few small brachiopods, crinoids stem segments. All look a little battered. 2'. 18) Covered, 29', probably mostly brown sand and siltstone. (Collection 8/6/57/6 float). 19) Like #17, 6". 20) Sandstone and siltstone, brown weathering, 24'. 21) Calcarenite, very fine grained, and gray weathering; very quartzic in spots; Siliceous bands 1/2" commons, 4'-4.5'. PG. 15 22) Sandstone and siltstone, light brown weathering, 1/16" beds or laminae; 31'. This is topped by a very fine grained calcarenite, 6" to 8" thick; has a 1/4" siliceous rich nearly fault top. 23) Conglomerate; medium brown weathering; up to 5" diameter. Cobbles in middle of unit. Bottom and top finer (1" or less) top is gradational with well laminated brown medium sandstone, well cemented (siliceous and calcic) about 2" thick; total 3.5'. 24) Sandstone, light brown, 1/16" laminae, porous and friable. 1.5'.