Jacks Ridge N 4 (Paleocene of the United States)

Where: McCone County, Montana (47.8° N, 106.1° W: paleocoordinates 54.0° N, 80.8° W)

• coordinate based on political unit

When: lower Member (Tullock Formation), Puercan (66.0 - 63.3 Ma)

Environment/lithology: terrestrial

Primary reference: D. L. Lofgren. 1995. The Bug Creek problem and the Cretaceous-Tertiary transition at McGuire Creek, Montana. University of California Publications in Geological Sciences 140:1-185 [J. Alroy/J. Alroy/M. Carrano]more details

PaleoDB collection 14747: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• one of only two Tullock localities in Lofgren's field area
Mammalia
 Multituberculata - Eucosmodontidae
Stygimys sp. Sloan and Van Valen 1965 multituberculate
sensu stricto