Where: Ada County, Idaho (43.6° N, 116.2° W: paleocoordinates 44.0° N, 114.7° W)

• coordinate based on political unit

When: Chalk Hills Formation (Idaho Group), Hemphillian (10.3 - 4.9 Ma)

• Martin 2022: "These deposits are considered part of the Chalk Hills Formation of the Idaho Group, which are considered Upper Miocene (e.g., Swirydczuk et al., 1981; Stearley and Smith, 2016)."

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by Edward S. White; reposited in the USGS

Primary reference: J. C. Merriam. 1918. New Mammalia From the Idaho Formation. University of California Publications, Bulletin of the Department of Geology 10(26):523-550 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 19765: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)