Mountain Belts on Transform Faults |
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The Pyrénées is a 400 km long mountain belt along the boundary between Spain and France. In the middle Cretaceous the opening of the North Atlantic ocean induced the sinistral translation of the iberic peninsula along the North Pyrenean Transform Fault. This lithospheric scale strike-slip fault created a weak zone in the continental lithosphere, and controlled the deposition of pull-apart basins and the intrusion of mantle rocks (Lherzolite). In the Eocene (40 Ma ago) convergence occurred between France and the Iberic peninsula closing the basins and developing a symmetric mountain belt. |
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