USGS locality 336 near Hot Sulphur Springs, CO Middle Park Fm (Paleocene of the United States)

Also known as USGS locality 336

Where: Grand County, Colorado (40.1° N, 106.1° W: paleocoordinates 45.9° N, 85.9° W)

• coordinate based on political unit

When: Middle Park Formation, Paleocene (66.0 - 56.0 Ma)

• 'The horizon is about on a line between the Lignite series and the dark sandstones formed by the eruption debris from breccia beds.'

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; micaceous sandstone and shale

• 'dark micaceous sandstone or shale'

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by geologist L. Cannon, in the summer of Summer 1889.

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 40060: 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.
 Magnoliales - Lauraceae
Sassafras thermale Brown 1962 sassafras
 Fabales - Leguminosae
Leguminosites coloradensis Knowlton 1922