Where: Montana (47.1° N, 104.7° W: paleocoordinates 52.4° N, 82.5° W)
• coordinate based on political unit
When: Fort Union Formation, Paleocene (65.5 - 55.8 Ma)
• 'From first coal bed about 400 ft. above Pierre Shale.' From USGS unpublished log book. 'lower Fort Union, about 50+ feet thick ' From Brown.
• formation-level stratigraphic resolution
Environment/lithology: fluvial; shale and carbonaceous sandstone
Reposited in the USNM
Collection methods: quarrying, mechanical,
• Specimens were collected by Campbell, Leonard, Holgate & Clark, July 31, 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 40275: authorized by Peter Wilf, entered by Jocelyn Sessa on 21.06.2004