The Iberia-Eurasia plate boundary east of the Pyrenees

In this work we also individuate and introduce the eastern termination of the Iberia-Eurasia plate boundary. This is the Marguareis extensional system of the Brianconnais Domain of the SW Alps. The crustal-scale Marguareis extensional system involves Paleozoic and Mesozoic rocks and includes a tens of km long transfer fault flanking an extensional domino array that accounted for ca. 21cm of extension along 6 km long sections. When post-Cretaceous alpine rotation is removed, the mid-Cretaceous transfer fault and the extension direction of the Marguareis extensional system become oriented parallel to those of the other portions of the plate boundary, indicating its pertinence to the Bay of Biscay-Pyrenean rift system.