La sedimentación carbonatada en el Prepirineo aragonés durante el Cretácico superior

Abstract

Carbonate facies analysis carried out in the Upper Cretaceous of the Aragonese Prepyrenees (South-Pyrenean Basin) allows us to establish the palaeogeographic and palaeoambiental reconstruction for this area. Three stages have been established in order to show the sedimentary evolution for the Upper Cretaceous. During the Stage 1 (Upper Santonian) the sedimentary domain was initially flooded. In the Stage 2 (lowermost Campanian- Upper Campanian) offshore bars developed at the western and eastern ends; the rest of the sedimentary basin consisted of a shallow carbonate platform whose bottom-floor was inhabited by rudists and benthic foraminifera. During the Stage 3 the generalized shallowing of the platform gave way, during the Maastrichtian, to the continental Garumn facies deposit.