Cannonball Formation

Cannonball Formation
Stratigraphic range: Paleogene
TypeFormation
UnderliesBullion Creek Formation, Slope Formation
OverliesHell Creek Formation, Ludlow Formation
Location
RegionNorth Dakota
CountryUnited States

The Cannonball Formation is a geologic formation in western North Dakota. It preserves fossils dating back to the Paleogene Period.

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