Where: Montana (47.5° N, 107.9° W: paleocoordinates 54.2° N, 74.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bearpaw Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• Unit 5, lower 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 213165: authorized by Matthew Clapham, entered by Matthew Clapham on 26.08.2020

Creative Commons license: CC BY (attribution)