La estructura de la parte norte de la ventana tectónica del Narcea (zona cantábrica, NO de España)

Abstract

The rear part of the Somiedo thrust nappe, in the eastern limb of the Narcea Tectonic Window, depicts two superimposed thrust systems with their related folds. The first group of thrusts comprises the basal décollement of the Somiedo nappe, below the Láncara Formation, and its related imbricated and duplex thrust systems. The second group crosscuts the first one and most of the folds seen are related to it. Cross folding is present, produced by the interference of frontal and lateral culminations related to the second thrust generation. The superposition of these structures gave rise to the Narcea culmination, where the precambrian rocks outcrop. Its northern periclinal closure is caused by radial folds related to the second thrust group.