Sentinel Butte Formation

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

Geological formation in North Dakota, USA

Sentinel Butte Formation
Stratigraphic range: Thanetian ~58–55 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Bentonite (Big Blue Bentonite) in the Sentinel Butte Formation (North Dakota)
Type	Formation
Unit of	Fort Union Formation
Underlies	Golden Valley Formation
Overlies	Bullion Creek Formation
Location
Region	North Dakota
Country	United States

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.

See also

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• List of fossiliferous stratigraphic units in North Dakota
• Paleontology in North Dakota

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)

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