Where: Montana (47.3° N, 104.5° W: paleocoordinates 52.7° N, 81.6° W)
• coordinate based on political unit
When: Fort Union? Formation, Paleocene (66.0 - 56.0 Ma)
• Ft. Union or Ludlow Lignitic?
Environment/lithology: fluvial; coal
Reposited in the USNM
Collection methods: quarrying, mechanical,
• Collected by R.W. Brown and K.J. Murata on Aug. 21, 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 53538: authorized by Peter Wilf, entered by Jocelyn Sessa on 11.09.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Angiospermae | |
"Pterospermites cordatus" = Penosphyllum cordatum
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Beringiaphyllum cupanioides | |
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