USGS locality 8523, on Sweetgrass Creek (Paleocene of the United States)

Where: Montana (46.2° N, 110.1° W: paleocoordinates 52.5° N, 88.2° W)

• coordinate estimated from map

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, F. S. MacNeill, A. C. Silberling, Willis Hendekoper on Aug. 28, 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 53694: authorized by Peter Wilf, entered by Jocelyn Sessa on 13.09.2005

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
 Dipsacales - Caprifoliaceae
Viburnum antiquorum
 Magnoliales - Magnoliaceae
Magnolia borealis
 Rosales - Ulmaceae
Chaetoptelea microphylla
Chaetoptelea microphylla Newberry 1868 elm
 Oxalidales - Oxalidaceae
"Sapindus affinis" = Averrhoites affinis
"Sapindus affinis" = Averrhoites affinis Newberry 1868 wood sorrel
 Fagales - Juglandaceae
"Carya antiquorum" = Hicoria antiquora
"Carya antiquorum" = Hicoria antiquora Newberry 1868
 Vitales - Vitaceae
Ampelopsis acerifolia
Ampelopsis acerifolia Newberry 1868