Where: Blaine County, Montana (48.0° N, 109.0° W: paleocoordinates 55.0° N, 75.0° W)

• coordinate based on nearby landmark

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

• The fossils were found as "float" in the lower threee to five feet of the eroded exposure and also in situ in a rust-coloured sandy lens approximately four inches in thickness. The zone in general is a tan to ligth buff sandy stratified sediment.

Environment/lithology: estuary or bay; sandstone

Size classes: macrofossils, mesofossils

Primary reference: G. R. Case. 1978. A new selachian fauna from the Judith River Formation (Campanian) of Montana. Palaeontographica Abteilung A 160(Lfg. 1-6):176-205 [J. Kriwet/W. Glaeser/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 69150: authorized by Juergen Kriwet, entered by Wolfgang Glaeser on 20.02.2007, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)