Simplified geological map of Pyrenees. Abbreviations in northern Pyrenees: NPFT: North Pyrenean Frontal Thrust; NPZ: North Pyrenean Zone; NPF: North Pyrenean Fault; SZ: Subpyrenean Zone; MB: Mauléon Basin; CH: Carcassonne High; CLTZ: Corbières-Languedoc Transfer Zone. North Pyrenean basement massifs: AS: Agly-Salvezines; MM: Mouthoumet; MN: Montagne Noire Massif; BS: Saint Barthelemy; 3S: Trois Seigneurs. Abbreviations in southern Pyrenees: South Central Pyrenean Units; NT: Nogueres Thrust; BT: Bóixols Thrust; MsT: Monsec Thrust; SMT: Serres Marginals Thrust; BBA: Barbastro-Balaguer Anticline; SA: Sanaüja Anticline; TR: Transverse Ranges. Blue dashed lines locate cross-sections in Figures 7 and 8 and some crustal scale cross-sections along the same lines in Figure 4. Red dashed lines ECORS deep seismic crustal cross-sections (Fig. 4) and the deep seismic tomography profile P1 (Chevrot et al., 2018) in the NW Pyrenees.