Where: Niobrara County, Wyoming (43.3° N, 104.3° W: paleocoordinates 49.2° N, 71.6° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: lower unnamed shale Member (Pierre Shale Formation), Campanian (83.6 - 72.1 Ma)
• bed-level stratigraphic resolution
Environment/lithology: offshore; lithified, gray shale and limestone
Reposited in the USGS
Collection methods: mechanical,
• "[collected] from a ls concretion."
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 1637: authorized by John Alroy, entered by Mike Sommers on 19.05.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Placenticeras meeki ammonite | |
Solenoceras sp. Conrad 1860 ammonite | |
Gastropoda | |
Anisomyon borealis Morton 1842 pulmonate | |
| |
Bivalvia | |
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