Field Notebook: Texas 1959
Page 120
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Transcription
8) Ls., med gray, massive beds - 5 to 10' cliffs, thin irregular brow chert bands - 56' 9) Siltstone + shale, covered for most part, yellow to light brown weathering, upper 15' becomes a sandstone - 123' 10) Ls., med gray; basal 2-3 a calcirudite, becomes finer grained upwards, fuvellid common in a 6-12" band just above cngos. Coll 5A-10 - 8' 11) Siltstone + shale, yellow to green-gray, 4/8' 12) Ls., gray weathering, 3" to 1' beds, thin (1/2") siltinite beds - 4' 13) Sandst. siltstone sequence, gay to ory-brown weathering - 62' 14) Ls., calcirudite, gray, 3-6" beds - 5' 15) Sandstone, ory-brown, 6" to 6' beds; calcareous cement - 56' 16) Calcilutute, bn-gray weathering, 2" to 3' beds, irregular bands of chert (3 cycles) modules, grades upwards into quarty sandstone beds; at 56-60 there are several cmmy shell bed - calcified fossils - Coll. 5A-16 at 60' - 137' 17) Ls., brown-yellow weathering, 6" to 2' beds scattered white chert patches, cliff forms, saccharoidal with purple weathering patches, pitted surface - 25' 18) Ls., bwn-gray weathering, 6" beds - 17' Unconformity - 8' grrelief in 100 yards along slite. 19) Dolostone, brown-gray, rubbly cemented by clear calcite matrix - grows foggy ridge - 65'+ ↑ Start here