Where: Harding County, South Dakota (45.5° N, 103.2° W: paleocoordinates 50.7° N, 80.9° W)

• coordinate estimated from map

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

• About 15 feet below White River

Environment/lithology: fluvial

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by E.M. Parks and party on Aug. 19, 1911

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 58008: authorized by Peter Wilf, entered by Jocelyn Sessa on 16.01.2006

Creative Commons license: CC BY (attribution)