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, concretionary, ferruginous, gray, red, calcareous shale
Reposited in the USGS
Collection methods: mechanical,
• "[collected] from lower half"
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 1643: authorized by John Alroy, entered by Mike Sommers on 19.05.1999
Creative Commons license: CC BY (attribution)
Taxonomic list
Cephalopoda | |
Exiteloceras sp. Hyatt 1894 ammonite | |
Baculites rugosus Cobban 1962 ammonite | |
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Placenticeras sp. Meek 1876 ammonite | |
Eutrephoceras sp. Hyatt 1894 | |
Bivalvia | |
Nuculana sp. Link 1807 pointed nut clam | |
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Ostrea sp. Linnaeus 1758 oyster | |
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Lucina sp. Bruguière 1797 clam | |
Gastropoda | |
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Euspira obliquata moon snail | |
Scaphopoda | |
Dentalium gracile tusk shell | |
Bryozoa | |
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