Where: North Dakota (46.4° N, 102.3° W: paleocoordinates 51.4° N, 79.6° W)

• coordinate based on political unit

When: Fort Union Formation, Paleocene (66.0 - 56.0 Ma)

• 6 feet of lignite overlain by clay and sandstone (fossiliferous) - from USGS unpublished logbook.

Environment/lithology: fluvial; coal and claystone

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by R. W. Brown, J. Murata on July 6, 1931

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/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 58037: authorized by Peter Wilf, entered by Jocelyn Sessa on 16.01.2006

Creative Commons license: CC BY (attribution)