Field Notebook: WY, SD 1955
Page 43
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
chiefly platy thin SS and siltstone. Rests on massive SS unit below and occupies lower 6' of 8' obscured interval base of Part B. Part D. Big haznuts SS in E side roadcut. c 62.0+ Sandstone, massive, cliff-forming break 22-25 feet above base separates a lower coarse-grained loc. cyclic SS from upper medium-grained. About 0.2 of light gray silty claystone in break, greenish cast red at base. Upper part has a few thin shelly siltstone petings between massive ledges. Whole unit weathers brown, some black stain on upper part. contact knife edge. B 219 Claystone, frigmental, gray to light gray. Upperd 0.6 to 1.0 is hazd light gray silty and contains large logs. (Sample 1 = spec. fossil wood) (Sample 2 = grey claystone) 20