Sedimentación lacustre durante el Cretácico en la Cordillera Ibérica, España

Abstract

La sedimentación lacustre durante el Cretácico aparece en la Cordillera Ibérica relacionada principalmente con dos periodos: el comprendido entre el Berriasiense y el Aptiense (Cretácico inferior) y el Maastrichtiense (Cretácico terminal). El primero corresponde a una etapa de fracturación importante relacionada con una fase distensiva; se crean cuencas relativamente pequehas, pero muy subsidentes, con predominio de sedimentación continental. El segundo periodo corresponde a la etapa regresiva finicretácica, relacionada con una fase compresiva; se crean cubetas continentales aisladas.

Lake deposits were important in the Iberian Ranges during two episodes of the Cretaceous time: from Berriasian to Aptians(Lower Cretaceous) and during the Maastrichtian (Uppermost Cretaceous). The first one was related to the fracturation stage of an extensional phase, resulting in the formation of medium size(althoughvery subsident) continental basins (Iberian s,s,,Maestrazgo and Cameros), The second period corresponds with the Late Cretaceous regressive stage, and was associated with acompresional phase. As a result, several small and isolated basins appeared, and were filled with continental deposits.