USGS locality 8255, Colstrip, in blue clay and shale above coal (Paleocene of the United States)

Where: Montana (45.9° N, 106.6° W: paleocoordinates 51.7° N, 84.5° W)

• coordinate based on political unit

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

Environment/lithology: fluvial; siliciclastic sediments

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Collected by R. W. Brown, J. Murata on Sept. 10, 1931

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 53608: authorized by Peter Wilf, entered by Jocelyn Sessa on 12.09.2005

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.
Angiospermae
 Dipsacales - Caprifoliaceae
 Saxifragales - Cercidiphyllaceae
 Vitales - Vitaceae
Ampelopsis acerifolia Newberry 1868
 Fagales - Betulaceae
Corylus insignis Heer 1871 hazel
 Rosales - Ulmaceae
Chaetoptelea microphylla1 Newberry 1868 elm
Bivalvia
 Actinodontida - Cycloconchidae
Davidia antiqua2 Manchester 2002 clam