Evolución tectono-metamórfica de la unidad extensional de Adra (Complejo Alpujárride, Béticas centrales): Resultados preliminares.

• Azañón, J.M. ^[1] ; Crespo-Blanc, A. ^[1] ; García-Dueñas, V. ^[1] ; Sánchez-Gómez, M. ^[1]
  1. [1] Universidad de Granada

     Universidad de Granada

     Granada, España

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 4, 1996 (Ejemplar dedicado a: Comunicaciones presentadas en el IV Congreso Nacional de Geología, Alcalá de Henares, 1996), págs. 813-816
• Idioma: español
• Títulos paralelos:
  • Tectonometamorphic evolupon of the Adra extensional unit (Alpujarride Complex, central Betics): preliminary results
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• Resumen

  • 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.