Resumen de Pulsos transgresivos neógenos en el sector central del margen pasivo de la Cuenca del Guadalquivir
José Gabriel Pendón Martín, María Luz González-Regalado Montero, Francisco Ruiz Muñoz, Manuel Abad de los Santos, Josep Tosquella Angrill
The Guadalquivir foreland basin, located between the Iberian basement northward and the Betic orogene to the South, represents the western sector of the earlier foredeep basin of the Betic Cordillera after having been rotated. The sedimentary filling of this basin records along the northern passive margin an Upper Tortonian Transgressive System Tract, which stratigraphic architecture arranges both clastic and calcarenite environments. This stratigraphic succession along the Central sector of this margin o f the basin consists of alluvial fan and/or fan delta facies, which are recurrently cut by two transgressive pulses. Every pulse consists of an erosional sandy-conglomerate bar with Bivalves (Ostreidae, Isognomon), Balanids, Gastropods and other marine tests. There is a third pulse marked by a ravinement surface within beach facies, over which a new conglomerate bar is installed. Controlling factors o f these transgressive pulses correspond to: (!) eustatic raises, (2) tectonic activity along the passive margin of the basin, and/or (3) relative accumulation rates of both continental and marine sedimentary supply.
