Where: Natrona County, Wyoming (43.2° N, 107.1° W: paleocoordinates 44.8° N, 98.4° W)

• coordinate based on political unit

When: lower Member (White River Formation), Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial

Primary reference: E. N. Harshman. 1972. United States Geological Survey Professional Paper 745 [J. Alroy/J. Alroy] more details

PaleoDB collection 16896: authorized by John Alroy, entered by John Alroy on 30.04.1994

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)