Where: Montana (48.0° N, 106.3° W: paleocoordinates 54.4° N, 72.1° 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 212997: authorized by Matthew Clapham, entered by Matthew Clapham on 23.08.2020
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Nucula subplana nut clam | |
Yoldia evansi Meek and Hayden 1857 clam | |
Pecten nebrascensis scallop | |
Pteria (Oxytoma) nebrascana Evans and Shumard 1857 scallop | |
Ostrea sp. Linnaeus 1758 oyster | |
"Inoceramus sagensis" = Inoceramus (Cataceramus) sagensis
"Inoceramus sagensis" = Inoceramus (Cataceramus) sagensis Owen 1852 clam | |
Volsella sp. Scopoli 1777 mussel | |
"Leptocardia subquadrata" = Protocardia (Leptocardia), Leptocardia borealis
"Leptocardia subquadrata" = Protocardia (Leptocardia) cockle
Leptocardia borealis Whiteaves 1885 cockle | |
"Astarte" gregaria clam | |
Scaphopoda | |
Dentalium pauperculum tusk shell | |
Gastropoda | |
Polinices sp. Monfort 1810 moon snail | |
Drepanochilus evansi snail | |
Vanikoro ambigua snail | |
? Acteon sp. Montfort 1810 snail | |
Cephalopoda | |
Baculites corrugatus ammonite |