Antelope Creek (SDSM V-6244) (Eocene of the United States)

Where: Harding County, South Dakota (45.6° N, 103.9° W: paleocoordinates 47.3° N, 93.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Slim Buttes Formation, Duchesnean (39.7 - 37.0 Ma)

Environment/lithology: fluvial; siliciclastic sediments

• fauna "suggests that a permanently flowing river was present"
• the formation "is a thin sequence of variegated sands, silts, and clays"

Size class: macrofossils

Collected by R. W. Wilson in 1962; reposited in the SDSM

Primary reference: P. R. Bjork. 1967. Latest Eocene vertebrates from northwestern South Dakota. Journal of Paleontology 41(1):227-236 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16825: authorized by John Alroy, entered by John Alroy on 12.04.1997

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Mammalia
 Perissodactyla - Brontotheriidae
Duchesneodus uintensis
Duchesneodus uintensis Peterson 1931 brontothere
 Perissodactyla - Amynodontidae
Amynodontopsis bodei
Amynodontopsis bodei Stock 1933 odd-toed ungulate
Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp.
Lepisosteus sp. Agassiz 1843 gar