USGS locality 8885, Mackton No. 2 coal mine, 7 miles northeast of Big Sandy (Paleocene of the United States)

Where: Montana (48.2° N, 110.1° W: paleocoordinates 54.5° N, 87.4° W)

• coordinate based on political unit

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

• 10 feet above coal

Environment/lithology: fluvial; siliciclastic sediments and coal

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Collected by R.W. Brown on Aug. 22, 1940 and Aug. 17, 1950

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 53948: authorized by Peter Wilf, entered by Jocelyn Sessa on 18.09.2005

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.
Show authors, comments, and common names
Angiospermae
 Rosales - Ulmaceae
Celtis aspera2, Chaetoptelea microphylla1
Celtis aspera2 Manchester 2014 hackberry
Chaetoptelea microphylla1 Newberry 1868 elm
 Fagales - Fagaceae
Quercus sullyi
Quercus sullyi Newberry 1883 oak
 Saxifragales - Cercidiphyllaceae
Cercidiphyllum arcticum
 Coniferales - Cupressaceae
Glyptostrobus nordenskioldi, Metasequoia occidentalis
Glyptostrobus nordenskioldi Chinese swamp cypress
Metasequoia occidentalis Chaney 1951 dawn redwood
1Hickey 1977; 2Manchester et al. 2002