Grinnell Mammoth (Pleistocene of the United States)

Where: Poweshiek County, Iowa (41.7° N, 92.7° W: paleocoordinates 41.8° N, 92.5° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Pleistocene (2.6 - 0.0 Ma)

Environment/lithology: terrestrial; unlithified, coarse-grained, pebbly claystone

• Badly broken mammoth bones in the drift clay and pebbles

Size class: macrofossils

• well worn molar, proximal end of a tibia, glenoid fossa of scapula, fragment of a shaft of a femur, casts in clay of medullary cavities.

Preservation: cast, original aragonite

Collection methods: quarrying,

• Workmen, while engaged in excavating an enormous well to supply the water-tanks of the Iowa Central Railroad, came upon certain badly broken mammoth

•bones

Primary reference: E. H. Barbour. 1890. Remains of the primitive elephant found in Grinnell, Iowa. Science 16:263-263 [M. Uhen/S. Tucker]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 94578: authorized by Mark Uhen, entered by Samantha Tucker on 01.03.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Proboscidea - Elephantidae
"Elephas primigenius" = Mammuthus primigenius
"Elephas primigenius" = Mammuthus primigenius Blumenbach 1799 wooly mammoth