Where: Fremont County, Wyoming (43.2° N, 108.2° W: paleocoordinates 44.8° N, 99.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Big Sand Draw Sandstone Lentil Member (White River Formation), Early/Lower Chadronian (37.2 - 33.9 Ma)

• said to be early Chadronian

Environment/lithology: terrestrial

Primary reference: F. B. Van Houten. 1964. Tertiary geology of the Beaver Rim area, Fremont and Natrona Counties, Wyoming. United States Geological Survey Bulletin 1164:1-99 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 16904: authorized by John Alroy, entered by John Alroy on 30.04.1994

Creative Commons license: CC BY (attribution)