Also known as Eureka Valley Road (USGS f158; MV 6403)

Where: Gallatin County, Montana (45.9° N, 111.6° W: paleocoordinates 47.7° N, 102.7° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: middle Member (Climbing Arrow Formation), Early/Lower Chadronian (37.2 - 33.9 Ma)

• from the "middle white unit"

• member-level stratigraphic resolution

Environment/lithology: terrestrial; siltstone

Size class: macrofossils

Reposited in the USGS

• Rahn Farm and Eureka Valley Road are distinct localities, but collections are lumped by Tabrum et al.

Primary reference: A. R. Tabrum, R. Nichols, and A. D. Barnosky. 2001. Tertiary paleontology of southwest Montana and adjacent Idaho. Museum of the Rockies Occasional Paper 3:93-112 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27245: authorized by John Alroy, entered by John Alroy on 24.11.2002

Creative Commons license: CC BY (attribution)