Chronology of the transverse Cretaceous deformation steps within the Tardets-Mauléon Basin. The Albo-Aptian Saison and Barlanès Fault Zones are poorly represented, on account of the thickness of the flysch cover and the weakness of the pyrenean folding. On the contrary, the transverse Albo-Cenomanian bordering Ossau and Saint-Jean-Pied-de-Port faults are more obvious as they allow the outcropping of the Palaeozoic basement. 1: location of the cross sections (Fig. 8); 2: main Albo-Aptian fault zones; 3: main Albo-Cenomanian fault zones; 4: main Pyrenean faults; 5: Tardets-Sorholus Flysch Trough; 6: Mauléon-Saint-Jean-de-Luz Basin.