Where: Beaverhead County, Montana (45.0° N, 112.8° W: paleocoordinates 46.9° N, 104.0° W)
• coordinate based on political unit
When: lower Member (Cook Ranch Formation), Chadronian (37.2 - 33.9 Ma)
Environment/lithology: terrestrial
Primary reference: A. R. Tabrum, D. R. Prothero, and D. Garcia. 1996. Magnetostratigraphy and biostratigraphy of the Eocene-Oligocene transition, southwestern Montana. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 278-311 [J. Alroy/J. Alroy/J. Alroy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 16989: authorized by John Alroy, entered by John Alroy on 12.04.1997
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
|
Brachyrhynchocyon dodgei Scott 1898 bear-dog described by Clark and Beerbower 1967 and said to be from "Spring Gulch" in Sage Creek area
| |
|
"Leptomeryx" speciosus Lambe 1908 ruminant | |
"Leptotragulus profectus" = Trigenicus profectus
"Leptotragulus profectus" = Trigenicus profectus Matthew 1903 protoceratid | |