Introduction de l'analyse multifactorielle dans le traitement de données palynofloristiques santoniennes (Crétacé supérieur)

The data processing, with multifactorial analysis, of palynofloras yielded by seven Santonian lignitic levels in the Dieulefit locality (Drôme, France) and by eight levels of same facies in the Nyons locality (Drôme, France) enables us to establish relations within a basin (deposit) between the variations in the relative frequencies of Normapolles taxa and the sedimentary factors, especially the facies and the alluvial deposits.The comparison, with the same method, between Nyons and Dieulefit deposits on the basis of their common taxa emphasizes the phytogeographical differences existing between these Santonian deposits (Upper Cretaceous)