title: List of fossiliferous stratigraphic units in Idaho
text: # List of fossiliferous stratigraphic units in Idaho
  
  This article contains a list of fossil-bearing stratigraphic units in the state of Idaho, U.S.
  
  ## Sites
  
  | Group or Formation | Period |
  | - | - |
  | American Falls Lake Bed E Formation | |
  | Arco Hills Formation | Carboniferous |
  | Beaverdam Formation | Neogene |
  | Black Mesa Gravel Formation | |
  | Bruneau Formation | Pliocene-Pleistocene |
  | Chalk Hills Formation | Neogene |
  | Challis Volcanics Formation | Paleogene |
  | Clarkia Formation | Neogene |
  | Coon Hollow Formation | Jurassic |
  | Dinwoody Formation | Triassic |
  | Elkhead Limestone | Cambrian |
  | Garden City Formation | Ordovician |
  | Glenns Ferry Formation | Pliocene |
  | Hole Formation | Neogene |
  | Idavada Volcanics Formation | Neogene |
  | Imnaha Basalt Formation | Neogene |
  | Jefferson Formation | Devonian |
  | Lakeview Formation | Cambrian |
  | Langston Formation | Cambrian |
  | Latah Formation | Neogene |
  | Lead Bell Shale (Spence Shale) Formation | Cambrian |
  | Little Flat Formation | Carboniferous |
  | Lodgepole Formation | Carboniferous |
  | Lodgepole Limestone | Carboniferous |
  | Martin Bridge Formation | Triassic |
  | McGowan Creek Formation | Carboniferous |
  | Meade Peak Formation | Permian |
  | Middle Canyon Formation | Carboniferous |
  | Monroe Canyon Formation | Carboniferous |
  | Muldoon Canyon Formation | Carboniferous |
  | Park City Formation | Permian |
  | Peterson Creek Beds Formation | |
  | Phi Kappa Formation | Silurian, Ordovician |
  | Phosphoria Formation | Permian |
  | Poison Creek Formation | Neogene |
  | Railroad Canyon Beds Formation | Neogene |
  | Rennie Shale | Cambrian |
  | Sage Junction Formation | Cretaceous |
  | Salmon City Formation | Paleogene |
  | Salt Lake Formation | Miocene-Pliocene |
  | Saturday Mountain Formation | Ordovician |
  | Seven Devils Group/Martin Bridge Formation | Triassic |
  | Snaky Canyon Formation | Permian |
  | St. Charles Formation | Cambrian |
  | Starlight Formation | Neogene |
  | Surrett Canyon Formation | Carboniferous |
  | Thaynes Formation | Triassic |
  | Thaynes Formation | Triassic |
  | Thaynes Formation | Triassic |
  | Thaynes Group/Thaynes Formation | Triassic |
  | Trail Canyon Formation | Permian |
  | Twin Creek Formation | Jurassic |
  | Ute Formation | Cambrian |
  | Valmy Group/Phi Kappa Formation | Ordovician |
  | Wayan Formation | Cretaceous |
  | White Knob Formation | Permian |
  | Woodside Formation | Triassic |
  