Lake Oahe (Pleistocene of the United States)

Where: Emmons County, North Dakota (46.0° N, 100.4° W: paleocoordinates 46.0° N, 100.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Late/Upper Pleistocene (0.1 - 0.0 Ma)

• "very thin and discontinuous late Wisconsinan glacial drift, including river sediments, overlies the Cretaceous Pierre Formation at this site... [the specimen] was found totally exposed on the Lake Oahe beach associated with modern bison and other bones and cultural artifacts weathering out of an Extended Middle Missouri Tradition variant village archeological site referred to as the Havens site... An accelerator mass spectrometer age of 11, 915 ± 40 years ago (CAMS-87696) was established for highly purified bone collagen from the specimen"

Environment/lithology: glacial; lithology not reported

Size class: macrofossils

Collected by L. Vannurden, D. Vannurden in 1999

Collection methods: surface (float),

• North Dakota State Fossil Collection

•"found as float"

Primary reference: J. W. Hoganson and H. G. McDonald. 2007. First report of Jefferson's ground sloth (Megalonyx jeffersonii) in North Dakota: Paleobiogeographical and paleoecological significance. Journal of Mammalogy 88(1):73-80 [J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 93268: authorized by John Alroy, entered by John Alroy on 11.01.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Xenarthra - Megalonychidae
Megalonyx jeffersonii Desmarest 1822 Jefferson's ground sloth
ungual