USGS locality 4273, Davis Creek, Medora ND, upper Fort Union Fm (Paleocene of the United States)

Where: North Dakota (46.9° N, 103.5° W: paleocoordinates 52.1° N, 80.7° W)

• coordinate based on political unit

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

• formation-level stratigraphic resolution

Environment/lithology: fluvial; claystone

• Clay just above upper coal.

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by F.H. Knowlton, July 11, 1907

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 40430: authorized by Peter Wilf, entered by Jocelyn Sessa on 23.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Species lists for Brown 1962 were compiled from the publication and provided for the Paleobiology Database by Drs. Steven R. Manchester and Peter R. Crane.
Show authors, comments, and common names
Polypodiopsida
 Polypodiales - Polypodiidae
Dennstaedtia americana
Dennstaedtia americana Knowlton 1910