Where: Montana (46.6° N, 105.9° W: paleocoordinates 52.2° N, 83.4° W)
• coordinate based on political unit
When: Tongue River Member (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 and F. S. MacNeill on Aug. 17, 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 53845: authorized by Peter Wilf, entered by Jocelyn Sessa on 14.09.2005
Creative Commons license: CC BY (attribution)
Taxonomic list
Dicotyledoneae | |
Trapa angulata Brown 1962 water caltrop | |
Angiospermae | |
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