Also known as UNSM 157

Where: Morrill County, Nebraska (41.7° N, 103.1° W: paleocoordinates 42.6° N, 97.3° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Brown Siltstone Member (Brule Formation), Arikareean (29.5 - 18.5 Ma)

• Unit A

Environment/lithology: terrestrial

Reposited in the UNSM

Primary reference: C. C. Swisher. 1982. Stratigraphy and biostratigraphy of the eastern portion of the Wildcat Ridge, western Nebraska. 1-172 [J. Alroy/J. Alroy/J. Marcot]more details

PaleoDB collection 17599: authorized by John Alroy, entered by John Alroy on 30.04.1994

Creative Commons license: CC BY (attribution)