Field Notebook: Texas 1957a
Page 112
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Transcription
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.