Where: Montana (48.3° N, 106.1° W: paleocoordinates 54.5° N, 71.7° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Bearpaw Formation, Late/Upper Campanian (83.5 - 70.6 Ma)
• Unit 6, middle part
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified shale
Size class: macrofossils
Reposited in the USNM
Primary reference: F. S. Jensen and H. D. Varnes. 1964. Geology of the Fort Peck area, Garfield, McCone and Valley counties, Montana. United States Geological Survey Professional Paper 414-F:1-49 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 213074: authorized by Matthew Clapham, entered by Matthew Clapham on 24.08.2020
Creative Commons license: CC BY (attribution)
Taxonomic list
Lingulata | |
Lingula nitida Meek and Hayden 1861 | |
Gastropoda | |
Cylichna cf. secalina Shumard 1861 snail | |
? Fasciolaria flexicostata tulip snail | |
Bivalvia | |
Goniomya americana clam | |
"Pteria linguaeformis" = Phelopteria linguaeformis
"Pteria linguaeformis" = Phelopteria linguaeformis Evans and Shumard 1854 pearl oyster | |
Pteria (Oxytoma) nebrascana Evans and Shumard 1857 scallop | |
"Inoceramus sagensis" = Inoceramus (Cataceramus) sagensis
"Inoceramus sagensis" = Inoceramus (Cataceramus) sagensis Owen 1852 clam | |
"Volsella meekii" = Modiolus meeki
"Volsella meekii" = Modiolus meeki Evans and Shumard 1857 mussel | |
Nucula subplana nut clam |