Pass Creek Oreodon Zone (Oligocene of the United States)

Where: Jackson County, South Dakota (43.8° N, 101.5° W: paleocoordinates 44.8° N, 93.2° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Brule Formation, Orellan (33.9 - 33.3 Ma)

• "the Oreodon zone of the Oligocene beds"

• bed-level stratigraphic resolution

Environment/lithology: fluvial; poorly lithified sandstone

• "some site in a watercourse"
• from a "patch" of "more or less indurated clayey sand" within an interval dominated by "clay"

Size class: macrofossils

Collected in 1932; reposited in the UMMP

Collection methods: quarrying, surface (in situ),

• the "bones of a rhinoceros" were exposed and the other specimens were quarried

Primary reference: A. Wetmore and E. C. Case. 1934. A new fossil hawk from the Oligocene beds of South Dakota. Contributions from the Museum of Paleontology, University of Michigan 4(8):129-132 [J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 76168: authorized by John Alroy, entered by John Alroy on 14.11.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Teleostei -
Siluriformes indet. catfish
"catfish"
Aves
 Accipitriformes - Accipitridae
Buteo grangeri n. sp. Wetmore and Case 1934 hawk
Mammalia
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet. Gray 1821 rhinoceros
 Perissodactyla - Equidae
Equidae indet. Gray 1821 horse
 Placentalia -
Rodentia indet. Bowdich 1821 rodent
"mouselike