Cannonball_Formation

Cannonball Formation

Cannonball Formation

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

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References

  1. [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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