USGS locality 337 Mount Bross, Hot Sulfur Springs, CO Middle Park Fm (Paleocene of the United States)

Also known as USGS locality 337, USGS locality 338, USGS locality 8787

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 outcrop is on the southern face of the mountain 25 feet above a conglomerate, which forms a prominent bench at about 1000 feet above the base of the mountain.' From USGS unpublished log book.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; sandy conglomerate and shale

• 'Middle Park: basal breccia and conglomerate, andesitic shales and sandstones, and thin coal seams.' From Brown 1962.

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 40061: 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.
 Pinales - Taxodiaceae
Glyptostrobus nordenskioldi Chinese swamp cypress
 Schizaeales - Schizaeaceae
 Rhamnales - Rosidae
Vitis olriki grapevine
 Urticales - Dilleniidae
 Scrophulariales - Asteridae
 Magnoliales - Lauraceae
Persea brossiana Brown 1962 laurel
 Saxifragales - Cercidiphyllaceae
 Fabales - Leguminosae
 Rosales - Saxifragaceae
 Proteales - Platanaceae
Platanus nobilis Newberry 1868 plane tree
Platanus raynoldsi plane tree
 Cornales - Cornaceae
Cornus hyperborea Heer 1871 dogwood