Where: Shannon County, South Dakota (43.3° N, 102.5° W: paleocoordinates 43.7° N, 100.5° W)
• coordinate based on political unit
When: Ash Hollow Formation (Ogallala Group), Clarendonian to Clarendonian (13.6 - 10.3 Ma)
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 18139: authorized by John Alroy, entered by John Alroy on 17.06.2000
Creative Commons license: CC BY (attribution)
Taxonomic list