Evidence for Devono-Carboniferous extensional tectonics in the central Pyrenees

Abstract

Detailed mapping of the prc-Variscan rocks exposed in the Southern Central Pyrenees reveals the occurrence of extensional tectonic contacts overprinted by main phase and pre-main phase folds. The interpretation of the former contacts as normal faults and the reinterpretation of other contacts described in the literature lead us to suggest an extensional event during Devonian and/or early Carboniferous times, prior to the contrac-tional Variscan paroxysm.