USGS locality 607 Sweetgrass Creek, MT, upper Fort Union Fm (Paleocene of the United States)

Where: Montana (49.0° N, 112.0° W: paleocoordinates 55.6° N, 89.1° W)

• coordinate based on political unit

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

• upper Fort Union.

• formation-level stratigraphic resolution

Environment/lithology: fluvial; sandstone

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by Walter H. Weed on July 5, 1892

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: taphonomic analysis

PaleoDB collection 40084: authorized by Peter Wilf, entered by Jocelyn Sessa on 16.06.2004

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.
Pteridopsida
 Polypodiales - Dryopteridaceae
Onoclea hesperia Hickey 1977