List of fossiliferous stratigraphic units in Wyoming

Group or Formation	Period	Notes
Almond Formation	Cretaceous
Almy Formation	Paleogene
Amsden Formation	Carboniferous
Arikaree Formation	Neogene
Ash Hollow Formation	Neogene
Aspen Shale	Cretaceous
Aycross Formation	Paleogene
Beartooth Butte Formation	Devonian
Bell Springs Formation	Triassic
Belle Fourche Formation	Cretaceous
Benton Formation	Cretaceous
Bighorn Formation	Ordovician
Bridger Formation	Paleogene
Brule Formation	Paleogene
Brule Formation	Paleogene
Carlile Shale	Cretaceous
Casper Formation	Permian, Carboniferous
Chadron Formation	Paleogene
Chugwater Group/Alcova Limestone	Triassic
Chugwater Group/Crow Mountain Formation	Triassic
Chugwater Group/Popo Agie Formation	Triassic
Chugwater Group/Red Peak Formation	Triassic
Cloverly Formation	Cretaceous
Cody Shale	Cretaceous
Colorado Formation	Cretaceous
Colorado Group/Graneros Shale	Cretaceous
Colorado Group/Mowry Shale	Cretaceous
Colter Formation	Neogene
Dakota Formation	Cretaceous
Deadwood Formation	Ordovician, Cambrian
Dinwoody Formation	Triassic
Dry Creek Shale	Cambrian
DuNoir Formation	Cambrian
DuNoir Limestone	Cambrian
Eagle Formation	Cretaceous
Evanston Formation	Paleogene
Fall River Sandstone	Cretaceous
Ferris Formation	Paleogene, Cretaceous
Fort Union Formation	Paleogene
Fowkes Formation	Paleogene
Frontier Formation	Cretaceous
Gallatin Formation	Cambrian
Gartra Formation	Triassic
Gering Formation	Paleogene
Goose Egg Formation	Permian
Green River Formation	Paleogene
Gros Ventre Formation	Cambrian
Gypsum Spring Formation	Jurassic
Gypsum Springs Formation	Jurassic
Hailey Shale	Cretaceous
Hanna Formation	Paleogene
Harebell Formation	Cretaceous
Harrison Formation	Miocene
Hoback Formation	Paleogene
Iles Formation	Cretaceous
Indian Meadows Formation	Paleogene
Jelm Formation	Triassic
Lamar River Formation	Paleogene
Lance Formation	Cretaceous
Lance Formation	Cretaceous
Laramie Formation	Cretaceous
Lebo Formation	Paleogene
Madison Group/Lodgepole Formation and Mission Canyon Formation	Devonian
Mancos Shale	Cretaceous
Marsland Beds Formation	Neogene
Medicine Bow Formation	Cretaceous
Mesaverde Formation	Cretaceous
Mesaverde Formation	Cretaceous
Mesaverde Formation	Cretaceous
Mesaverde Group/Almond Formation	Cretaceous
Meteetse Formation	Cretaceous
Middle Variegated Sequence Formation	Paleogene
Minnekahta Formation	Permian
Monroe Creek Formation	Paleogene
Montana Group/Fox Hills Formation	Cretaceous
Montana Group/Pierre Shale	Cretaceous
Morrison Formation	Jurassic
Mowry Shale	Cretaceous
Newcastle Sandstone	Cretaceous
Niobrara Formation	Cretaceous
North Park Formation	Neogene
Ogallala Formation	Neogene
Open Door Formation	Cambrian
Open Door Limestone	Cambrian
Park City Formation	Permian
Park Shale	Cambrian
Pass Peak Formation	Paleogene
Phosphoria Formation	Permian
Pierre Shale	Cretaceous
Pinyon Conglomerate Formation	Cretaceous
Polecat Bench Formation	Paleogene
Puerco Formation	Paleogene
Rock Springs Formation	Cretaceous
Satanka Formation	Permian
Sepulcher Formation	Paleogene
Shedhorn Formation	Permian
Shooting Iron Formation	Pliocene
Snowy Range Formation	Cambrian
Split Rock Formation	Neogene
Sundance Formation	Jurassic
Tatman Formation	Paleogene
Teewinot Formation	Neogene
Telegraph Creek Formation	Cretaceous
Tepee Trail Formation	Paleogene
Thaynes Formation	Triassic
Thomas Fork Formation	Cretaceous
Twin Creek Formation	Jurassic
Twin Creek Limestone	Jurassic
Wagon Bed Formation	Paleogene
Wapiti Formation	Paleogene
Wasatch Formation	Paleogene
Washakie Formation	Paleogene
White River Formation	Paleogene
Wiggins Formation	Paleogene
Willwood Formation	Paleogene
Wind River Formation	Paleogene
Woodside Formation	Triassic

See also

• Paleontology in Wyoming