Also known as Pierre Shale (USGS D1982, D1983, D1984)
Where: Niobrara County, Wyoming (43.3° N, 104.3° W: paleocoordinates 49.7° N, 79.1° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Baculites baculus ammonoid zone, upper unnamed shale Member (Pierre Shale Formation), Early/Lower Maastrichtian (70.6 - 66.0 Ma)
• Pierre shale, about 260' above top of Kara member; was 93 in bed/horizon.
• bed-level stratigraphic resolution
Environment/lithology: offshore; lithified, gray, silty shale and limestone
Size class: macrofossils
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 1586: authorized by John Alroy, entered by Mike Sommers on 17.05.1999, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
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Polychaeta | |
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Cephalopoda | |
Baculites baculus Meek and Hayden 1861 ammonite | |
Hoploscaphites quadrangularis ammonite
Acanthoscaphites sp. Nowak 1911 ammonite | |
Eutrephoceras montanaense Meek 1876 | |
Bivalvia | |
Nucula planimarginata Meek and Hayden 1857 nut clam | |
Nuculana evansi pointed nut clam | |
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"Modiolus meekii" = Modiolus meeki
"Modiolus meekii" = Modiolus meeki Evans and Shumard 1857 mussel | |
Anomia sp. Linnaeus 1758 jingle | |
Oxytoma nebrascana Evans and Shumard 1857 scallop | |
Syncyclonema sp. Meek 1864 scallop | |
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"Pteria linguaeformis" = Phelopteria linguaeformis
"Pteria linguaeformis" = Phelopteria linguaeformis Evans and Shumard 1854 pearl oyster | |
Ostrea sp. Linnaeus 1758 oyster | |
? Inoceramus cf. fibrosus Meek and Hayden 1857 clam originally entered as "? Inoceramus cf. fibrosus"
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"Idonearca shumardi" = Cucullaea (Idonearca)
"Idonearca shumardi" = Cucullaea (Idonearca) clam | |
Pholadomya sp. Sowerby 1823 clam | |
"Corbula crassimarginata" = Varicorbula crassimarginata
"Corbula crassimarginata" = Varicorbula crassimarginata Meek and Hayden 1860 clam | |
Protocardia sp. Beyrich 1845 cockle | |
Dosiniopsis deweyi Meek and Hayden 1856 venus clam | |
Gastropoda | |
Oligoptycha concinna snail | |
Astandes densatus snail | |
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Euspira obliquata moon snail | |
Scaphopoda | |
Dentalium gracile tusk shell |