USGS locality 8550, On road to Cap Rock, 18.5 miles northeast of Miles City (Paleocene of the United States)

Where: Montana (46.6° N, 105.9° W: paleocoordinates 52.2° N, 83.4° W)

• coordinate based on political unit

When: Tongue River Member (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 and F. S. MacNeill on Aug. 17, 1936

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 53845: authorized by Peter Wilf, entered by Jocelyn Sessa on 14.09.2005

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.
Dicotyledoneae
 Myrtales - Trapaceae
Trapa angulata Brown 1962 water caltrop
Angiospermae
 Garryales - Eucommiaceae
 Coniferales - Cupressaceae
Metasequoia occidentalis Chaney 1951 dawn redwood
cones