Field Notebook: Texas 1957b
Page 125
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Transcription
4 The NE ridge of the Dagout Mt. ridges contains Wolfcamp which swings about in strike to about N80°E. — This I would judge as a change from about N60E (to the SW). Oh for some photographs. The Gaptank goes through some beautiful folds and contortions. The small folds and faults near the top of the Gaptank I feel are good evidence for the extent of thrusting. 1 8/5/57 SW ankle of Dagout Mt.; Sect. 24. 1) Gaptank below is nearly vertical and strikes approximately S-15°W. Here it is a reddish-yellowish brown with a high % of CaCO3, scarcely sandstone, some siltist siltstone. 2) Covered 13' 3) Limestone, reddish brown weathering, very stendy (wt sand/quartz), high porosity, has specks of dark material dispersed, 1mm or less in size. 5' 8/5/57/1 4) Covered 7', probably much like #3 5) Calcareute, mud gray weathering, mud sand size. no identifiable fossils 2½' (afew crinoid columns) 6) Covered 2' 7) Limestone, brownish gray weathering, very silty, upper 2" are extra foraminiferal Crustula. 1½' 8) Covered, 4'