Field Notebook: Texas 1957a
Page 220
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
bed 8: 4'; covered bed 9: 6'; gray; 7/10/57/1} PG. 76 Section 29 Section 10 (dip 10°) (N) Covered below-float looks like bed #2 section I. 1) Limestone, organic fragmental, crinoids brachiopods weathers light gray with tinge of yellow. 2 rubble zones near base - a) 14' massive b) 3' in 1' beds c) 5' gray and yellow massive Top Gaptank 2) Covered 7' some gray-shale, probably all is! 3) Sandstone, very calcareous (grains) Fe2O3H2O acting as cement? weathers deep yellow brown. 3'. There are surfaces coated with crinoid frags. 4) Shale gray with few gray siltstones and very fine sandstone grading upward into dominant silt and sand over the shale - unit is essentially gray weathering throughout, becoming slightly yellow near top. 139'. PG. 77 {note: illustration: bed 1: 22'; 7/10/57/5 bed 2: 7'; bed 3: 7/10/57/6} 5) Sandstone fine grain, yellow-orange weathering, 3" to 8" beds, even bedding, nearly uniform size and color throughout unit. Total 53' Upper 3' are in 1' beds, paler colors than below. 6) 15' covered. PG. 78 7) Limestone, gray, rather fine shell hash. Mostly brachiopod fragments recognizable. 8'. 8) 14' covered. 9) Limestone, gray massive, shell hash, 2 beds 6' separated by 6" of limestone rubble. 12.5'. 10) Covered impart - most is a less resistant nodular limestone gray-brown weathering, brachiopod hash. 23'. 11) Limestone, gray massive biohermal 28' (_?_) 12) Covered 5'. 13) Limestone, gray, rubbly at base 2.5' fine hash. 14) Covered - 4'. {note: illustration: