Resumen de Evolución tectono-metamórfica de la unidad extensional de Adra (Complejo Alpujárride, Béticas centrales): Resultados preliminares.
José Miguel Azañón Hernández, Ana Crespo Blanc, Víctor García Dueñas, Mario Sánchez Gómez
In the central Betics, the Adra unit represents the higher unit of the Alpujarride complex. This unit is bounded by Miocene low-angle normal faults. The lithostratigraphic sequence of Adra unit includes, from bottom to top: darkschists with garnet, light coloured schists (Palaeozoic), phyllites (Permo-Triassic) and carbonated rocks (upper Triassic). North-vergent recumbent folds have been recognized within the unit. They affect the lithological boundaries, the metamorphic isogrades and the main foliation, this latter formed during a decompression, that is with an extensional character. These data suggest the alternance of contractional and extensional events during the tectonic evolution of the Alpujarride Complex.
