List of fossiliferous stratigraphic units in Ohio
# List of fossiliferous stratigraphic units in Ohio

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

## Sites

| Group or Formation | Period |
| - | - |
| Putnam Hill Formation | Carboniferous |
| Vanport Formation | Carboniferous |
| Washingtonville Formation | Carboniferous |
| Zaleski Formation | Carboniferous |
| Ames Formation | Carboniferous |
| Arnheim Formation | Ordovician |
| Bedford Shale | Devonian |
| Bellevue Formation | Ordovician |
| Bisher Formation | Silurian |
| Borden Formation | Carboniferous |
| Brassfield Limestone | Silurian |
| Breathitt Formation | Carboniferous |
| Bull Fork Formation | Ordovician |
| Chagrin Shale | Devonian |
| Clays Ferry Formation | Ordovician |
| Cleveland Shale | Devonian |
| Columbus Limestone | Devonian |
| Ames Limestone | Carboniferous |
| Duquense Coal | Carboniferous |
| Glenshaw Formation | Carboniferous |
| Mahoning Formation | Carboniferous |
| Corniferous Limestone | Devonian |
| Corryville Formation | Ordovician |
| Cuyahoga Formation | Carboniferous |
| Lucas Formation | Devonian |
| Dillsboro Formation | Ordovician |
| Dundee Formation | Devonian |
| Greene Formation | Permian |
| Washington Formation | Permian, Carboniferous |
| Kope Formation | Ordovician |
| McMicken Formation | Ordovician |
| Fairview Formation | Ordovician |
| Freeport Formation | Carboniferous |
| Glenshaw Formation | Carboniferous |
| Grant Lake Formation | Ordovician |
| Greenfield Formation | Silurian |
| Holland Quarry Shale | Devonian |
| Liberty Formation | Ordovician |
| Lilley Formation | Silurian |
| Lockport Dolomite | Silurian |
| Logan Formation | Carboniferous |
| Louisville Limestone | Silurian |
| Lucas Dolostone | Devonian |
| McMillan Formation | Ordovician |
| Maxville Limestone | Carboniferous |
| Maysville Formation | Ordovician |
| Fairview Formation | Ordovician |
| Miamitown Formation | Ordovician |
| Mount Auburn Formation | Ordovician |
| Ohio Black Shale | Devonian |
| Olentangy Shale | Devonian |
| Oregonia Formation | Ordovician |
| Peebles Dolomite | Silurian |
| Plum Brook Shale | Devonian |
| Portersville Limestone | Carboniferous |
| Pottsville Formation | Carboniferous |
| Putnam Hill Formation | Carboniferous |
| Richmond Formation | Ordovician |
| Elkhorn Formation | Ordovician |
| Waynesville Formation | Ordovician |
| Whitewater Formation | Ordovician |
| Saluda Formation | Ordovician |
| Silica Formation | Devonian |
| Sunset Formation | Ordovician |
| Sylvania Sandstone | Devonian |
| Tymochtee Formation | Silurian |
