Where: Niobrara County, Wyoming (43.2° N, 104.3° W: paleocoordinates 49.4° N, 72.4° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Mitten Black Shale Member (Pierre Shale Formation), Early/Lower Campanian (83.5 - 70.6 Ma)
• Unit 21, 217-233 feet above the base of the Mitten Member
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; lithified, concretionary, ferruginous, phosphatic, black, gray, calcareous shale
Size class: macrofossils
Preservation: original aragonite
Collected by W.A. Cobban in 1960; reposited in the USGS
Collection methods: mechanical,
Primary reference: J. R. Gill, W. A. Cobban, and P. M. Kier. 1966. The Red Bird Section of the Upper Cretaceous Pierre Shale in Wyoming. United States Geological Survey Professional Paper 393-A:1-73 [J. Alroy/M. Sommers/A. Clement]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 186542: authorized by Matthew Clapham, entered by Matthew Clapham on 24.06.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Baculites cobbani Khakimov 1976 ammonite | |
Hoploscaphites sp. Nowak 1911 ammonite | |
Bivalvia | |