Field Notebook: SD, WY, ND 1957
Page 107
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
57-14.0 Siltst, becoming sandy, loc 2 vfqs ss, clayey mottled gray + brownish weathers light brownish grey Scattered brown red brown weath ls concs in upper 4.5 Grass Roots. 2' top bluff A248 Cap of bluff contains float of highly fos. concs. - small Protocruzia- Pt. necrezcusis layer(s) - Coll. Loc. A Coll#1, also contains Eutrophoceros and B. bullosa A249 Float of ammonoid conc. - Nicollith zone. prob. Loc. A Coll #2 Statutory section Loc. B - Ridge N. of Whitehorse Shale slope in Elk Butte - about 20' gray fissile shale slope into Gully, capped by 5'+ popcorn weath. bl. gray (bentonitic)shale, then about 7 feet to zone smell OB to O weath. concs. Scattered large OB cones in shale throat. 52