Where: Brown County, Nebraska (42.7° N, 100.0° W: paleocoordinates 43.3° N, 96.7° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Crookston Bridge Member (Valentine Formation), Barstovian (16.3 - 12.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: M. F. Skinner and F. W. Johnson. 1984. Tertiary stratigraphy and the Frick Collection of fossil vertebrates from north-central Nebraska. Bulletin of the American Museum of Natural History 178(3):1-368 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 18051: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)