The Clansayesian (Uppermost Aptian)-Early Albian main rifting stage and the creation of the Tardets-Mauléon Basin. A: simplified isopach map. Note the close relationship between the transverse N20 fault zones, the salt diapirs and the depocenters. B: NW–SE section showing the block tilting on an hyper-extended crust and the creation of a marine deep trough filled up with Flysch Noir sediments during the following Albian late rifting stage (Fig. 5).