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)
• lower Fort Union.
• formation-level stratigraphic resolution
Environment/lithology: fluvial; carbonaceous shale
Reposited in the USNM
Collection methods: quarrying, mechanical,
• Specimens were collected by Leonard, Holgate & Clark, Aug. 28 and Sept. 1, 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 40272: authorized by Peter Wilf, entered by Jocelyn Sessa on 21.06.2004
Creative Commons license: CC BY (attribution)