Belle Fourche Formation
The Belle Fourche Formation or Belle Fourche Shale is a geologic unit classification in Montana, North Dakota, South Dakota, and Wyoming, formed in a stage of the Western Interior Seaway, and roughly corresponding in age with the Graneros Shale classification in states to the south and east.[1] It preserves fossils dating back to the Cretaceous period.
| Belle Fourche Formation Stratigraphic range: Cretaceous | |
|---|---|
| Type | Formation |
| Location | |
| Region | Montana, North Dakota, South Dakota, Wyoming |
| Country | United States |
See also
References
- "Geologic Unit: Belle Fourche". National Geologic Database. Geolex — Unit Summary. United States Geological Survey. Retrieved 2018-06-29.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.
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