La Plataforma Triásica Alpujárride (Zonas Internas de la Cordillera Bética, España)

Laburpena

Taking into account previous detailed stratigraphic and facies analyses carried out in the Alpujarride succession from the Sierra de Gádor (Almeria province) and correlations with other sectors, we propose a synthetic stratigraphic column for the Alpujarride Triassic Platform; this column consists of two formations: a basal meta-siliciclastic formation (divided in three members, from base to top: lower, middle and upper) Anisian in age, and an overlying meta-carbonate formation (divided in six members, 1 to 6 from base to top) Anisian-Norian in age. We postulate a morphological evolution of the Alpujarride Triassic Platform including three phases: an Anisian-Ladinian homoclinal ramp first phase, a Ladinian-Carnian fault-block-type platform second phase, and a Norian rimmed platform third phase. We also divide the Anisian-Norian stratigraphic record in four depositional sequences (DS). DS1 should comprise the lower and middle members of the meta-siliciclastic formation; DS2 should be formed by the upper member of the meta-siliciclastic formation and members 1 and 2 of the meta-carbonate formation; DS3 should consist of members 3 and 4; SD4 should be composed of members 5 and 6.