Clansayesian (Upermost Aptian) and Early Albian block tilting and diapirism in the southern part of the Tardets-Mauléon Basin. A: General view of the Arbailles block showing the location of a southeastward slipped carbonate olistolith (northern side of the Apoura valley). B: Southeastward glided (arrows) carbonate bloks (Urgo-Clansayesian platform) in the black shale deposits of the Beloscare diapir-related rim syncline (Apoura valley). C: Diapiric Jurassic-reworking breccias in the core of the Beloscare diapir. D: Lauriolle diapir. Megabreccias reworking Jurassic and Early Cretaceous limestones fill up the collapsed core of the structure.