title: List of fossiliferous stratigraphic units in Bulgaria
text: # List of fossiliferous stratigraphic units in Bulgaria
  
  | Group or Formation | Period |
  | - | - |
  | Babino Formation | Triassic |
  | Bilka Formation | Jurassic |
  | Cerkoviste Formation | Jurassic |
  | Djula Formation | Jurassic |
  | Kajlâka Formation | Cretaceous |
  | Karavelyovo Formation | Jurassic |
  | Lovech Urgonian Group/Balgarene Formation | Cretaceous |
  | Lovech Urgonian Group/Emen Formation | Cretaceous |
  | Lovech Urgonian Group/Smochan Formation | Cretaceous |
  | Milanovo Formation | Triassic |
  | Ozirovo Formation | Jurassic |
  | Polaten Formation | Jurassic |
  | Radomir Formation | Triassic |
  | Sanadinovo Formation | Cretaceous |
  | Slivnitsa Formation | Cretaceous, Jurassic |
  | Sokolovskaya Series Formation | Jurassic |
  