El Cretático superior del Prebético externo en el norte de Yecla (Murcia)

Abstract

Eight formations are identified in carbonate platform series of upper Cretaceous age (upper Albian-lower Campanian) in Yecla region (Prebetic palaeogeographic setting, Murcia province, SE Spain). Their stratigraphical and sedimentological analysis allows to differenciate two depositional megasequences with their internal divisions and evolutionary trends, and then to compare them with those of the Iberian Cordillera. The major patterns of both basin evolutions are suprabasinal. In prebetic pasive margin, the first megasequence (of upper Albian-upper Cenomanian pro parte age) is controlled by eustatism, great subsidence and sinsedimentary tectonics. The second (uppermost Cenomanian-lower Campanian), characterized by a greater stability, is strongly controlled by Iberian Plate geodinamics. On the other hand, biostratigraphic data permits, by once, to date upper Cenomanian platform sediments in Prebetic area, and to questionate about Turonian existence.