Where: Beaverhead County, Montana (45.0° N, 112.8° W: paleocoordinates 46.9° N, 104.0° W)
• coordinate based on political unit
• small collection-level geographic resolution
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 16949: authorized by John Alroy, entered by John Alroy on 12.04.1997
Creative Commons license: CC BY (attribution)
Taxonomic list
Mammalia | |
"Leptomeryx" speciosus Lambe 1908 ruminant | |
Ischyromys sp. Leidy 1856 rodent | |
"Paradjidaumo trilophus" = Adjidaumo trilophus
"Paradjidaumo trilophus" = Adjidaumo trilophus Cope 1873 rodent | |
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