Field Notebook: WY, SD 1955
Page 109
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
0.6 Clzystone, gray, with 0.1 to 0.2 white porcelinite at base. 1.7-3.5 Silty, black, carbonaceous becoming silty at base, Thickens up dip at expense of SS below and thin porcelinite comes in 1.7 from base, beneath it dk gray siltst. grading to gray. 5.5-3.0 Szudstone, tabular to massive x-1cm, hard., weather light-gray 2.8 Clzystone, light gray, finely silty, blocky to splintery fracture, (sample 3) 15.5 Sandstone, fine-gr, in irreg leaves, loc. 1cm. to irreg thin bedded, some massive x-1cm blocks weather, shelvy gray ledge Hzs interbeds silty SS and gray siltstone 1.7 Szudstone, fine gr., soft, 14 thin beds with 1cm + thin beds of black (2)k SG, 54