# List of fossiliferous stratigraphic units in Wyoming

This article contains a list of fossil-bearing stratigraphic units in the state of Wyoming, U.S.

## Sites

| Group or Formation | Period |
| 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 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 |
| Laramie Formation | Cretaceous |
| Lebo Formation | Paleogene |
| Madison Group/Lodgepole Formation and Mission Canyon Formation | Mississippian |
| Mancos Shale | Cretaceous |
| Marsland Beds Formation | Neogene |
| Medicine Bow 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 |
| Shedhorn Sandstone | 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 |