Sand Creek (Orellan/Nebraska) (Oligocene of the United States)

Where: Sioux County, Nebraska (42.4° N, 103.8° W: paleocoordinates 43.6° N, 95.7° W)

• coordinate based on political unit

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

Environment/lithology: terrestrial; lithology not reported

Size classes: macrofossils, mesofossils

Primary reference: J. Clark and J. R. Beerbower. 1967. Geology, paleoecology, and paleoclimatology of the Chadron Formation. Fieldiana 5(5):21-74 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 17175: authorized by John Alroy, entered by John Alroy on 18.10.1995, edited by Terri Cleary

Creative Commons license: CC BY (attribution)

Taxonomic list

• Brule "A" based on Schultz and Falkenbach 1956
just south of Round Top and perhaps equivalent to UNSM Sx-22
 Squamata -
Peltosaurus granulosus2 Cope 1873 squamates
CM 1038, anterior portion of right dentary and fragment of left
 Perissodactyla - Hyracodontidae
Hyracodon nebraskensis Leidy 1850 odd-toed ungulate
CM specimen from "Orellan of Sand Creek, Sioux Co."
 Ungulata - Merycoidodontidae
Miniochoerus affinis1 Leidy 1869 oreodont
 Ungulata - Entelodontidae
Archaeotherium mortoni3 Leidy 1850 even-toed ungulate
"lower Oreodon beds at the head of Sand Creek, Nebraska"; Gidley collection of 1896