Révision téphrochronologique des dépôts fossilifères plio-pléistocènes des environs de Perrier et Champeix (Puy-de-Dôme-France) in Le Villafranchien méditerranéen. Stratigraphie. Environnement bioclimatique. Morphogenèse et néotectonique. I
and alluvial deposits at Perrier Plateau and surroundings is presented correlatively with new K/Ar measurements. Precisions are given concerning faunas from Roca Neyra and Pardines (< 2.4 My), and from Champeix ( 0.8 My). These new data allow to point out
the fauna from Perrier-Etonaires at 2.6-2.5 My. This questions the lower limit of villafranchian stage.