Field Notebook: Texas 1957a
Page 250
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Transcription
PG. 123 \n{note: illustration: bed 13: 7/20/57/2 bed 15: 7/20/57/3 bed 21: 7/20/57/4; 7/20/57/8} \n19) Limestone fragmental (organic) and quartz fine sand, crinoid frags and brach shells, become more sandy upwards. 9'. 20) Covered - 6'. 21) Limestone, clastic, gray weathering like the other lower clastic limestone, has flat top with 1" siliceous zone 8" to 1', 7/20/57/4, 5 repeats of this lower lowest lithology (at least) in 8" to 3' beds; 18' near top some chert chips. 7/20/57/8. 22) Sandstone, very fine size, weathers light brown thin but uneven laminae. With 2, 3" limestone of the #21 type. 9'. \nPG. 124 \n23) Limestone, clastic and organic frag. gray weathering with a tinge of brown. 2 cyclic beds one (a) 3'; (b) about 4'. Collection 7/20/57/5. Flat tops are silicified and weather a brown Iron oxide color. 7'. 24) Covered, 14'. 25) Limestone, calcarenite, both clastic and organic frags, weather light gray- brown. 1' to 2' beds. 12'. 26) Covered, 31', probably light brown very fine sandstone or siltstone. 27) Marl? This unit is worth additional study. Massive Rx, no bed except near top in a irregular surface. 2 shades of silty limestone; one light brown one light gray - they occur interlocked with each other - also coarse sand size chert and limestone fragments are twisted and warped through this bed. Several kinds of brach shells, bryozoans, and fusulines. I believe this is a bed of slumped material. \nPG. 125 \n{note: illustration: bed 23: (a) and (b) 7/20/57/5} \non over steepened Permian near shore deposit, a 3" diameter pebble is staring at me. 1.5'. 28) 7', light brown weathering, very fine sandstone. 29) Limestone, gray (dark) clastic, some 1/4" diameter chert and quartzite, 1/2" red-brown siliceous upper surface. 6". 30) Like #28, 8'. 31) Limestone, light brown to gray-brown weathering; very silty and very fine sand size - an irregular 3" band of very fine pebble. 1/2'. 32) Covered, 13', probably like #28. \nPG. 126