List of fossiliferous stratigraphic units in Idaho
# 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 |
