Please help me with the below..  I found this pectenoid fossil and many more in the rumbles of an old mine in Attika area af Greece.    Usually the terestrial fossils near the beach are of Pliocene or Pleistocene age.    But this fossil comes from the digged earth of a mine and looks totally different than the Pliocene shells. It has Black color and the shape is also different..    It reminds me of Neithea species?? But Neithea were Jurassic era fossils... Coul