Where: Custer County, Montana (46.4° N, 105.8° W: paleocoordinates 52.1° N, 83.4° W)
• coordinate based on political unit
When: Fort Union Formation, Paleocene (66.0 - 56.0 Ma)
• 'Bluffs of yellowstone across the river from Miles City. 115ft. above river level in clay between two lignite seams.' From USGS unpublished log book.
• formation-level stratigraphic resolution
Environment/lithology: fluvial; yellow claystone
Reposited in the USNM
Collection methods: quarrying, mechanical,
• Specimens were collected by Leonard, Holgate & Clark, Sept. 3, 1906.
Primary reference: R. W. Brown. 1962. Paleocene flora of the Rocky Mountains and Great Plains. United States Geological Survey Professional Paper 375:1-119 [P. Wilf/J. Sessa/J. Sessa]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 40274: authorized by Peter Wilf, entered by Jocelyn Sessa on 21.06.2004
Creative Commons license: CC BY (attribution)