Nature, Origin, and Evolution of the Pyrenean?Cantabrian Junction

We investigate the present-day orogenic architecture of Pyrenean-Cantabrian junction corresponding to a boundary between inverted rift segments using seismic interpretation, field data, and borehole information. This was formerly attributed major NNE-SSW striking Pamplona transfer fault segmenting Basque-Cantabrian Mauléon basins during both rifting convergence. Our study shows that results from strong decoupling thick-skinned (basement-involved) thin-skinned (detached in Upper Triassic evaporites) modes deformation. The evaporites horizon responsible for transport allochthony former over large distances on top Basque massifs Ebro Aquitaine foreland basins. A crustal-scale cross-section depicts forming crustal wedge crusts Iberian, Ebro, Eurasian affinity. Three-dimensional analysis suggests two phases related can be recognized: Late Jurassic-Barremian Aptian-Cenomanian Furthermore, we show Aptian-Cenomanian, spatially overlapped north south were controlled by WNW-ESE extensional faults. These discard existence argue direction extension mid-Cretaceous. emphasizes role inheritance reactivation provides new syn-rift template, which Alpine reactivation. Finally, these have implications Iberia-Eurasia plate kinematics North Pyrenean