Sentinel Butte Formation
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| Sentinel Butte Formation | |
|---|---|
| Stratigraphic range: Thanetian ~ | |
| File:Big Blue Bentonite (Sentinel Butte Formation, Upper Paleocene; Coal Vein Trail, Roosevelt National Park, Little Missouri Badlands, North Dakota, USA) 5.jpg 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 | File:Flag of the United States (23px).png United States |
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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
References
- ↑ Bluemle, John P. 1988. "Generalized Bedrock Geological Map of North Dakota" (PDF). North Dakota Geological Survey, Miscellaneous Map 28. Retrieved 2017-02-03.
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