USGS locality 333 near Hot Sulphur Springs, CO Middle Park Fm (Paleocene of the United States)

Also known as USGS locality 333, USGS locality 334, USGS locality 335, and USGS locality 8788

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

• coordinate based on political unit

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

• 'The 'doleritic breccia' so called, Bed A of the Middle Park formation, is about 900 feet thick. It approximately underlies the Lignitic formation conformably, and rests unconformably upon the Cretaceous strata of various formations. Collections from the sandy stratum above main breccia mass.' From USGS unpublished log book, not from Brown 1962.

• member-level stratigraphic resolution

Environment/lithology: fluvial; sandy conglomerate

• 'Sandy stratum above main breccia mass.' From USGS unpublished log book.

•'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 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/J. Sessa]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40059: 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.
 Equisetales - Equisetaceae
Equisetum spp. Linnaeus
 Schizaeales - Schizaeaceae
 Polypodiales - Blechnaceae
Woodwardia arctica Brown 1962
 Rhamnales - Rosidae
 Saxifragales - Cercidiphyllaceae
 Fagales - Fagaceae
Castanea intermedia Lesquereux 1878 chestnut
Lastrea goldiana Lesquereux 1878