Description
CLUSTER D'AMMONITES DE FRANCE AMMONITE CLUSTER FROM FRANCE Crioceras cuvieri et Olcostephanus sayni Hauterivian (Cretaceous) (130 Ma) Area of Ruissas (26), Southeastern France A hundred million years ago, a group broke with the classic winding pattern of ammonites (in a spiral with contiguous turns) to develop an infinity of other...