title: List of fossiliferous stratigraphic units in Colorado
text: # List of fossiliferous stratigraphic units in Colorado
  
  This is a list of fossil-bearing stratigraphic units the U.S. State of Colorado.
  
  ## Sites
  
  | Group or Formation | Period |
  | - | - |
  | Alamosa Formation | Pleistocene |
  | Animas Formation | Paleogene, Cretaceous |
  | Arapahoe Formation | Cretaceous |
  | Battle Mountain Formation | Carboniferous |
  | Belden Shale | Carboniferous |
  | Browns Park Formation | Neogene |
  | Brule Formation | Paleogene |
  | Carline Shale | Cretaceous |
  | Chadron Formation | Paleogene |
  | Chinle Formation | Triassic |
  | Chinle Group/Sheep Pen Sandstone | Triassic |
  | Chinle Group/Sloan Canyon Formation | Triassic |
  | Coalmont Formation | Paleogene |
  | Colorado Group/Carlile Shale | Cretaceous |
  | Colorado Group/Graneros Shale | Cretaceous |
  | Colorado Group/Greenhorn Limestone | Cretaceous |
  | Colorado Group/Niobrara Formation | Cretaceous |
  | Creede Formation | Paleogene |
  | Cuchara Formation | Paleogene |
  | Cutler Formation | Permian |
  | D Sandstone | Cretaceous |
  | D1 Formation | Paleogene |
  | Dakota Formation | Cretaceous |
  | Dakota Group/Mesa Rica Sandstone | Cretaceous |
  | Dakota Group/Muddy Sandstone | Cretaceous |
  | Dakota Group/Pajarito Formation | Cretaceous |
  | Dakota Group/Plainview Formation | Cretaceous |
  | Dakota Group/South Platte Formation | Cretaceous |
  | Dawson Formation | Paleogene |
  | DeBeque Formation | Paleogene |
  | Denver Formation | Paleogene, Cretaceous |
  | Dotsero Formation | Cambrian |
  | Dyer Formation | Devonian |
  | Farisita Formation | Paleogene |
  | Florissant Formation | Paleogene |
  | Fort Union Formation | Paleogene |
  | Fountain Formation | Carboniferous |
  | Fox Hills Formation | Cretaceous |
  | Fox Hills Sandstone | Cretaceous |
  | Fremont Formation | Ordovician |
  | Glen Canyon Group/Navajo Sandstone | Jurassic |
  | Glen Canyon Group/Wingate Sandstone | Triassic |
  | Green River Formation | Paleogene |
  | Greenhorn Formation | Cretaceous |
  | Greenhorn Limestone | Cretaceous |
  | Harding Formation | Ordovician |
  | Harding Sandstone | Ordovician |
  | Huerfano Formation | Paleogene |
  | Iles Formation | Cretaceous |
  | Laramie Formation | Paleogene, Cretaceous |
  | Leadville Limestone | Carboniferous |
  | Lewis Shale | Cretaceous |
  | Mancos Shale | Cretaceous |
  | Manitou Limestone | Ordovician |
  | Maroon Formation | Permian, Carboniferous |
  | Martin Canyon Beds Formation | Neogene |
  | McCoy Formation | Carboniferous |
  | Mesaverde Formation | Paleogene, Cretaceous |
  | Middle Park Formation | Paleogene |
  | Minturn Formation | Carboniferous |
  | Montana Group/Pierre Shale | Cretaceous |
  | Morrison Formation | Jurassic |
  | Niobrara Formation | Cretaceous |
  | North Park Formation | Neogene |
  | Ohio Creek Formation | Paleogene |
  | Ouray Formation | Devonian |
  | Paradox Formation | Carboniferous |
  | Pawnee Creek Formation | Neogene |
  | Pierre Shale | Cretaceous |
  | Poison Canyon Formation | Paleogene |
  | Priest Canyon Formation | Ordovician |
  | Purgatoire Formation | Cretaceous |
  | Raton Formation | Paleogene |
  | Sangre de Cristo Formation | Carboniferous |
  | Sawatch Formation | Cambrian |
  | Shoshone? Formation | Paleogene |
  | Split Rock Formation | Neogene |
  | Summerville Formation | Jurassic |
  | Troublesome Formation | Neogene |
  | Vermejo Formation | Paleogene |
  | Wasatch Formation | Paleogene |
  | Washakie Formation | Paleogene |
  | Weber Formation | Carboniferous |
  | White River Formation | Paleogene |
  | White River Group/Brule Formation | Paleogene |
  | Williams Fork Formation | Cretaceous |
  