Abstract
A controversial subject from the systematic point of view, various representatives of these two families, regarded as hystrichospheres, acritarchs or Algae (Chlorophyceae), have been observed by us linked with the remains of vegetative organs (probable Algae?). Their mass, their abundance at certain levels, and their association with a very special biochemical environment, give reliable witness to a marine milieu which has marked diverse epochs, from Palaeozoic to Recent(?).If they constitute a remarkable palaeobiological material, these Algae(?). which are capable of enormous proliferation, have another interest, that of a veritable biogeological phenomenon, which has led to the formation of “marine peats” of great amplitude. These considerable masses of “organic matter”, which are associated with an argillaceous silt material which may be more or less carbonate-rich, would be excellent mother rocks for hydrocarbons.
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