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L'examen de donnees publiees et de nouvelles observations de terrain permettent d'etablir la succession des faunes de poissons entre le Cenomanien inferieur et le Turonien inferieur dans le bassin du Tafilalt ainsi que dans ses regions avoisinantes (Sud-Est du Maroc). L'analyse de l'evolution des ichtyofaunes montre le passage de paleoenvironnements dulcaquicoles a des paleoenvironnements marins....
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