title: List of fossiliferous stratigraphic units in Massachusetts
text: # List of fossiliferous stratigraphic units in Massachusetts
  
  This article contains a list of fossil-bearing stratigraphic units in the state of Massachusetts, U.S.
  
  ## Sites
  
  | Group or Formation | Period |
  | - | - |
  | Agawam Group/Portland Formation | Jurassic |
  | Agawam Group/Turners Falls Formation | Jurassic |
  | Chamberlain's Brook Formation | Cambrian |
  | Meriden Group/East Berlin | Jurassic |
  | Mount Toby Formation | Jurassic |
  | Portland Formation | Jurassic |
  | Weymouth Formation | Cambrian |
  