Beaver Wall ( of the United States)

Where: Sheridan County, Nebraska (42.7° N, 102.5° W: paleocoordinates 43.5° N, 96.7° W)

• coordinate based on political unit

When: Brown Siltstone Member (Brule Formation), Arikareean (30.8 - 20.4 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Primary reference: R. H. Tedford, J. B. Swinehart, R. M. Hunt, Jr. and M. R. Voorhies. 1985. Uppermost White River and lowermost Arikaree rocks and faunas, White River Valley, north-western Nebraska and their correlation with South Dakota. Dakoterra 2(2):335-352 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 17470: authorized by John Alroy, entered by John Alroy on 05.08.1996

Creative Commons license: CC BY (attribution)

Taxonomic list

• 15' below the Nonpareil Ash Zone (NPAZ)
"White River Fauna III" in part
Mammalia
 Artiodactyla - Merycoidodontidae
cf. Mesoreodon chelonyx Scott 1893 oreodont
cf. Mesoreodon minor Douglass 1903 oreodont