After more than a century of studies of the Quaternary of the Lyon area, it was commonly admitted to assimilate the piémont lobe of Lyon to the glacier of the Rhone. Today, new datas call into question this traditional view. Based on various methods of glaciologie and pétrographie analysis and on an acurate reconstitution of the paleography, this study shows that the Iséroise ices come from the Alpine groove were predominantly responsible for the feeding of the piémont lobe of Lyon.Après plus d 'un siècle d 'études du Quaternaire de la région lyonnaise, il était communément admis d 'assimiler le lobe de piémont lyonnais au glacier du Rhône. Aujourd'hui, de nouvelles données remettent en cause cette vision traditionnelle. S 'appuyant sur dif...