Above Pocket Mouse Burrows (Miocene of the United States)

Where: Antelope County, Nebraska (42.4° N, 98.1° W: paleocoordinates 42.8° N, 95.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Merritt Dam Member (Ash Hollow Formation), Late/Upper Clarendonian (13.6 - 10.3 Ma)

• same unit as Pocket Mouse Burrows (see); single sandstone bed

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; sandstone

• "higher energy deposition... a braided stream similar to the modern Platte River"
• cross-bedded clean sands

Size class: macrofossils

Primary reference: M. R. Voorhies. 1974. Fossil pocket mouse burrows in Nebraska. American Midland Naturalist 91(2):492-498 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 37803: authorized by John Alroy, entered by John Alroy on 24.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Perissodactyla - Equidae
Pseudhipparion gratum Leidy 1869 hipparionine horse