title: List of fossiliferous stratigraphic units in North Dakota
text: # List of fossiliferous stratigraphic units in North Dakota
  
  This article contains a list of fossil-bearing stratigraphic units in the state of North Dakota, U.S.
  
  ## Sites
  
  | Group or Formation | Period |
  | - | - |
  | Arikaree Formation | Paleogene |
  | Brule Formation | Paleogene |
  | Bullion Creek Formation | Paleogene |
  | Cannonball Formation | Paleogene |
  | Carlise Shale | Cretaceous |
  | Chadron Formation | Paleogene |
  | Colorado Group/Niobrara | Cretaceous |
  | Deadwood Formation | Ordovician |
  | Fox Hills Formation | Cretaceous |
  | Fort Union Formation | Paleogene, Cretaceous |
  | Fort Union Group/Sentinel Butte | Paleogene |
  | Golden Valley Formation | Paleogene |
  | Hell Creek Formation | Cretaceous |
  | Kildeer Formation | Neogene |
  | Lance Formation | Paleogene, Cretaceous |
  | Ludlow Formation | Paleogene |
  | Sentinel Butte Formation | Paleogene |
  | Slope Formation | Paleogene |
  | Stony Mountain Formation | Ordovician |
  | Tongue River Formation | Paleogene |
  | Winnipegosis Formation | Devonian |
  