La falla de Ubierna (margen SO de la cuenca Cantábrica)

Abstract

The Ubierna fault is a major structure in the southern margin of the Cantabrian Basin. It controlled the subsidence during the intra-Mesozoic extensional event allow ing the deposit of progressively to the north thicker syn-rift Upper Jurassic-Lower Cretaceous sediments in the Polients trough. Later it was inverted as a reverse fault during the main Tertiary compression changing to a strike-slip behaviour in the latest compressive movements.