Where: Grand County, Colorado (40.2° N, 106.1° W: paleocoordinates 40.8° N, 103.2° W)

• coordinate based on political unit

When: upper Member (Troublesome Formation), Miocene (23.0 - 5.3 Ma)

• Troublesome Formation is 23.5 to 11Ma according to dated tuffs at top and bottom (Izett & Obradovich 2001)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: T. H. V. Rich. 1981. Origin and History of the Erinaceinae and Brachyericinae (Mammalia, Insectivora) in North America. Bulletin of the American Museum of Natural History 171(1):1-116 [J. Alroy/J. Alroy/P. Mannion]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18934: authorized by John Alroy, entered by John Alroy on 26.07.1994

Creative Commons license: CC BY (attribution)