USGS locality 4029, 13 miles north of Jordan, MT, lower Fort Union Fm (Paleocene of the United States)

Where: Dawson County, Montana (47.3° N, 106.9° W: paleocoordinates 53.1° N, 84.2° 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; claystone

• 'Light colored clays above the Laramie.' From USGS unpublished log book.

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by Leonard, Holgate & Clark, Sept. 25, 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/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40279: authorized by Peter Wilf, entered by Jocelyn Sessa on 21.06.2004

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.
 Polypodiales - Dryopteridaceae
Onoclea hesperia Hickey 1977