Where: Pennington County, South Dakota (43.8° N, 102.1° W: paleocoordinates 45.1° N, 93.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Chadron Formation, Chadronian (37.2 - 33.9 Ma)

• "at the top of the Chadron formation" and therefore possibly equivalent to the Peanut Peak Member

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; limestone

Size class: macrofossils

Preservation: adpression

Collected by H. H. Krumvieda; reposited in the SDSM

Primary reference: H. B. Tordoff and J. R. Macdonald. 1957. A new bird (family Cracidae) from the early Oligocene of South Dakota. Auk 74(2):174-184 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 74636: authorized by John Alroy, entered by John Alroy on 20.08.2007

Creative Commons license: CC BY (attribution)