ammonites
Antelope Creek (SDSM V-582) (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 (40.4 - 37.2 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 B. White, J. Clark in 1958; 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 16823: authorized by John Alroy, entered by John Alroy on 12.04.1997

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)