Cannonball Formation

The Cannonball Formation is a geologic formation in western North Dakota.^[1] It preserves fossils dating back to the Paleogene Period.

Cannonball Formation
Stratigraphic range: Paleogene
Type	Formation
Underlies	Bullion Creek Formation, Slope Formation
Overlies	Hell Creek Formation, Ludlow Formation
Location
Region	North Dakota
Country	United States

See also

• Paleontology portal

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