title: List of fossiliferous stratigraphic units in Ohio
text: # 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 |
  