Sentinel Butte Formation

The Sentinel Butte Formation is a geologic formation of Paleocene age in the Williston Basin of western North Dakota.[1] It preserves significant assemblages of non-marine plant and animal fossils.

Sentinel Butte Formation
Stratigraphic range: Thanetian
~58–55 Ma
Bentonite (Big Blue Bentonite) in the Sentinel Butte Formation (North Dakota)
TypeFormation
Unit ofFort Union Formation
UnderliesGolden Valley Formation
OverliesBullion Creek Formation
Location
RegionNorth Dakota
Country United States

See also

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References

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  1. ^ Bluemle, John P. 1988. "Generalized Bedrock Geological Map of North Dakota" (PDF). North Dakota Geological Survey, Miscellaneous Map 28. Retrieved 2017-02-03.{{cite web}}: CS1 maint: numeric names: authors list (link)