Field Notebook: Texas 1957a
Page 132
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Transcription
122 10.) Covered 3' 11) LS, congo, chert quartzly pebbles; to clastic sandy matrix. 1' to 2' beds; Top is same old flat surface, well sorted, and silicified 1/2" to 1". 9' 12) Covered, clayey, probably clastic LS, congo. 13) LS, organic frags, bryozoans, crinoid (stem) brachiopods; 7/20/57/2 ; 1/2' 14) Covered, 5' 15) LS, organic clay. 7/20/57/3, rubbly at base becoming [illegible], well sorted in upper 6", top 1" is silicified and laminated, top is flat. 2 1/2' 16) Covered 5' 17) LS, organic frags clastic, some small chert granules - a few lines or so, echinoid spines [2'] 18) 17' covered 123 7/20/57/8 22 7/20/57/4 21 19) 18 17 20. 16 15 14 13 12 11 10 19) LS, fragmental (organic) and quartz sand matrix, crinoid frags & track trails, become more sandy upwards. 9' 20) Covered - 6' 21) LS, clastic, gray weathering like the other lower clastic LS, fine flat top w/1" silicified zone 8" to 1" 7/20/57/4 5 repeats of this lowest unit (at least) in 8" to 3' beds; 18' some chert clasts 7/20/57/8 near top 22) Sandstone, rf. size, weather light brown thin but uneven laminated. w/ 2,3" lbs. of the #21 type. 9'