USGS locality 8222, At first of Blue Buttes, south of Keene, Fort Union Fm (Paleocene of the United States)

Where: Powell County, North Dakota (46.6° N, 112.5° W)

• Paleocoordinates: 56.8° N, 78.2° W (Wright 2013)

• coordinate based on political unit

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

Environment/lithology: fluvial; shale

• clinker

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Specimens were collected by R. W. Brown, J. Murata on June 25, 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 58036: authorized by Peter Wilf, entered by Jocelyn Sessa on 16.01.2006

Creative Commons license: CC0 (CC0)

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
Polypodiopsida
 Polypodiales - Polypodiidae
Dennstaedtia americana
Dennstaedtia americana Knowlton 1910
 Coniferales - Cupressaceae
Thuja interrupta
Thuja interrupta Newberry 1868 cypress
Angiospermae
 Rosales - Ulmaceae
Celtis aspera
Celtis aspera Manchester 2014 hackberry
 Fagales - Juglandaceae
"Carya antiquorum" = Hicoria antiquora
"Carya antiquorum" = Hicoria antiquora Newberry 1868