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

• coordinate based on political unit

When: 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: J. Munthe. 1988. Miocene mammals of the Split Rock area, Granite Mountains basin, central Wyoming. University of California Publications in Geological Sciences 126:1-136 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 18941: authorized by John Alroy, entered by John Alroy on 27.09.1993

Creative Commons license: CC BY (attribution)