Where: Valley County, Montana (48.2° N, 106.4° W: paleocoordinates 54.5° N, 72.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Baculites jenseni ammonoid zone, Bearpaw Shale Formation (Montana Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• 80 or 90 m below top

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary shale

Size class: macrofossils

Collected by F.S. Jensen in 1950; 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 178331: authorized by Matthew Clapham, entered by Matthew Clapham on 01.05.2016

Creative Commons license: CC BY (attribution)