Analogías y diferencias en la evolución sedimentaria de las Cuencas del Duero, Occidental Portuguesa y Lousä (Península Ibérica)

Abstract

Three sedimentary basins linked to the evolutive history of Hesperic Massif during the Cretaceous and the Tertiary Times are described and contrasted: Duero Basin, Western Portuguese Basin and Lousa Basin.All of them are filled with continental deposits; alluvial and lacustrine deposits.There only exist shallow marine sediments, of scarce importance, in the Western Portuguese Basin.Although the structural settings of the basins are different they have similar features that give evidence of convergent stages in their sedimentary evolution. These features are: the megasequencial architecture they have in common and the existence of silcretes in equivalent stratigraphie positions.