title: List of fossiliferous stratigraphic units in Ontario
text: # List of fossiliferous stratigraphic units in Ontario
  
  This is a list of stratigraphic units in Ontario bearing fossils.
  
  | Group or formation | Period |
  | - | - |
  | Aberdeen Lake Formation | Ordovician |
  | Amherstburg Formation | Devonian |
  | Arkona Formation | Devonian |
  | Arkona Shale | Devonian |
  | Attawapiskat Formation | Silurian |
  | Bad Cache Rapids Group/Surprise Creek Formation | Ordovician |
  | Bertie Group/Williamsville Formation | Silurian |
  | Black River Group/Bobcaygeon Formation | Ordovician |
  | Black River Group/Ottawa Formation | Ordovician |
  | Bobcaygeon Formation | Ordovician |
  | Cabot Head Formation | Silurian |
  | Cobourg Formation | Ordovician |
  | DeCew Formation | Silurian |
  | Detroit River Group/Lucas Formation | Devonian |
  | Don Beds Formation | Canada |
  | Dyer Bay Formation | Silurian |
  | Ekwan River Formation | Silurian |
  | Eramosa Formation | Silurian |
  | Farr Formation | Ordovician |
  | Fossil Hill Formation | Silurian |
  | Gasport Formation | Silurian |
  | Georgian Bay Formation | Ordovician |
  | Goat Island Formation | Silurian |
  | Guelph Formation | Silurian |
  | Gull River Formation | Ordovician |
  | Hamilton Group/Hungry Hollow Formation | Devonian |
  | Irondequoit Limestone Formation | Silurian |
  | Kettle Point black Shale | Devonian |
  | Kwataboahegan Formation | Devonian |
  | Lockport Formation | Silurian |
  | Long Rapids Formation | Devonian |
  | Lowville Formation | Ordovician |
  | Manitoulin Formation | Silurian, Ordovician |
  | Meaford Formation | Ordovician |
  | Medina Group/Power Glen Formation | Silurian |
  | Missinabi Formation | Canada |
  | Murray Island Formation | Devonian |
  | Nottawasaga Group/Georgian Bay Formation | Ordovician |
  | Nottawasaga Group/Whitby Formation | Ordovician |
  | Ohio Shale | Devonian |
  | Onondaga Formation | Devonian |
  | Ottawa Formation | Ordovician |
  | Ottawa Group/Lowville Formation | Ordovician |
  | Oxford Formation | Ordovician |
  | Pamelia Formation | Ordovician |
  | Power Glen Formation | Silurian |
  | Power Glen Shale | Silurian |
  | Queenston Formation | Ordovician |
  | Rochester Shale | Silurian |
  | Scarborough Formation | Canada |
  | Sextant Formation | Devonian |
  | Simcoe Group/Bobcaygeon Formation | Ordovician |
  | Simcoe Group/Gull River Formation | Ordovician |
  | Simcoe Group/Lindsay Formation | Ordovician |
  | Simcoe Group/Verulam Formation | Ordovician |
  | St. Edmund Formation | Silurian |
  | Stooping River Formation | Devonian |
  | Thorold Formation | Silurian |
  | Trenton Group/Cobourg limestone Formation | Ordovician |
  | Trenton Group/Sherman Fall limestone Formation | Ordovician |
  | Verulam Formation | Ordovician |
  | Williams Island Formation | Devonian |
  