Big Rock Ranch (Paleocene of the United States)

Also known as UCM 78060

Where: Rio Blanco County, Colorado (40.0° N, 107.9° W: paleocoordinates 45.3° N, 90.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: DeBeque Formation, Clarkforkian (56.8 - 55.8 Ma)

• said to be Clarkforkian

Environment/lithology: terrestrial

Primary reference: A. J. Kihm. 1984. Early Eocene Mammalian Fauna of the Piceance Creek Basin. Northwestern Colorado [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 15219: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Primates - Plesiadapidae
cf. Chiromyoides sp. Stehlin 1916 primate
 Rodentia - Paramyidae
? Franimys sp. Wood 1962 rodent
 Multituberculata - Ptilodontidae
Ptilodus sp. Cope 1881 multituberculate