Willoughby Creek (Gray Sands) (Miocene of the United States)

Where: Ravalli County, Montana (45.9° N, 114.2° W: paleocoordinates 46.6° N, 111.2° W)

• coordinate based on political unit

When: Miocene (23.0 - 5.3 Ma)

Environment/lithology: terrestrial

Primary reference: R. L. Konizeski. 1958. Pliocene vertebrate fauna from the Bitterroot Valley, Montana, and its stratigraphic significance. Geological Society America Bulletin 69:345-346 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 19124: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Proboscidea - Mammutidae
Mammut sp. Blumenbach 1799 mastodon
"Pliomastodon cf. P. matthewi"