USGS locality 325 near Sedalia, CO Denver Fm (Paleocene of the United States)

Also known as USGS locality 325

Where: Colorado (39.4° N, 103.0° W: paleocoordinates 44.8° N, 82.7° W)

• coordinate based on political unit

When: Denver Formation, Paleocene (66.0 - 56.0 Ma)

• Denver Basin

•'Leaves from the lower layer 6 ft. below the upper layer, or in a layer of shale under coarse conglomerate.'

• formation-level stratigraphic resolution

Environment/lithology: fluvial; shale and sandy claystone

• 'Denver Formation: arenaceous clays, shales, basalt flows'

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by A. Lakes, and given to S. F. Emmons, USGS, who gave them to Brown.

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 39895: authorized by Peter Wilf, entered by Jocelyn Sessa on 10.06.2004

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.
unclassified
  -
Gastropoda
 Ficoidea - Ficidae
Ficus affinis fig shell
Monocotyledoneae
 Arecales - Palmae
Dicotyledonae
 Urticales - Dilleniidae
 Myrtiflorae - Nyssaceae
Magnoliopsida
 Malvales - Sterculiaceae
"Pterospermites cordatus" = Penosphyllum cordatum
"Pterospermites cordatus" = Penosphyllum cordatum Manchester 2014
Allantodiopsis erosa
  -
Allantodiopsis erosa Knowlton 1919
Lastrea
  -
Lastrea goldiana Lesquereux 1878