title: List of fossiliferous stratigraphic units in Michigan
text: # List of fossiliferous stratigraphic units in Michigan
  
  This article contains a list of fossil-bearing stratigraphic units in the state of Michigan, U.S.
  
  ## Sites
  
  | Group or Formation | Period |
  | - | - |
  | Antrim Shale | Devonian |
  | Bass Islands Group | Silurian |
  | Bill's Creek Shale | Ordovician |
  | Chandler Falls Formation | Ordovician |
  | Collingwood Formation | Ordovician |
  | Cordell Formation | Silurian |
  | Corniferous Formation | Devonian |
  | Lucas Formation | Devonian |
  | Georgian Bay Formation | Ordovician |
  | Groos Quarry Formation | Ordovician |
  | Marshall Formation | Carboniferous |
  | Pointe aux Chenes Formation | Silurian |
  | Richmond Formation | Ordovician |
  | Stonington Formation | Ordovician |
  | Rogers City Formation | Devonian |
  | Saginaw Group | Devonian - Carboniferous |
  | Silica Formation | Devonian |
  | Stonington Formation | Ordovician |
  | Four Mile Dam Formation | Devonian |
  | Alpena Formation | Devonian |
  | Gravel Point Formation | Devonian |
  | Norway Point Formation | Devonian |
  | Petosky Limestone | Devonian |
  | Potter Farm Formation | Devonian |
  | Thunder Bay Limestone | Devonian |
  | Trenton Formation | Ordovician |
  | Waverly Sandstone | Carboniferous |
  