USGS 8921, Fort Union Fm (Paleocene of the United States)

Where: Wyoming (41.4° N, 109.2° W: paleocoordinates 47.7° N, 88.8° 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,

• Specimens were collected by R.W. Brown on June 23, 1941

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 57996: authorized by Peter Wilf, entered by Jocelyn Sessa on 15.01.2006

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.
Polypodiopsida
 Polypodiales - Polypodiidae
Onoclea hesperia Hickey 1977
Angiospermae
 Saxifragales - Cercidiphyllaceae
 Vitales - Vitaceae
Vitis olriki Heer 1868 grapevine
 Fagales - Betulaceae
Corylus insignis Heer 1871 hazel
 Rosales - Ulmaceae
Celtis aspera1 Manchester 2014 hackberry
 Oxalidales - Oxalidaceae
"Sapindus affinis" = Averrhoites affinis
"Sapindus affinis" = Averrhoites affinis Newberry 1868 wood sorrel
 Malvales - Sterculiaceae
"Pterospermites cordatus" = Penosphyllum cordatum
"Pterospermites cordatus" = Penosphyllum cordatum Ward 1885
Juglandiphyllites glabra
  -
Juglandiphyllites glabra2 Manchester and Dilcher 1997