
handle: 10272/18085
Se analizan las dos alteraciones localizadas dentro y en la cima del Mioceno tardío en la región centro-oriental de la cuenca del Duero. Se tratan cuestiones presentadas sobre el significado estratigráfico. La alteración más baja afecta a la cima de la unidad de margas y yeso (U.3.), la cual está relacionada con mayores cambios paleogeográficos hacia condiciones menos evaporíticas. La alteración más alta define el límite más alto del registro del Neógeno en la cuenca, y está relacionada con el gran pie de montaña del Plio-Pleistoceno, el cual bisela la serie del Neógeno desde los bordes hasta el centro de la cuenca.
Analysis was made of two alterations located within and on the top of the Late Miocene in the central-eastern region of the Duero Basin. Questions arising about their stratigraphic significance are also approached. The lower alteration affects the top of the marly-gypsiferous unit (U. 3) and is related to major paleogeographic change towards less evaporitic conditions. The upper alteration defines the upper boundary of Neogene record in the basin and is related to the extensive Plio-Pleistocene pediment, which bevels the Neogene serie from the borders to the centre of the basin
Late Miocene, Spain, Tertiary Duero Basin, Alteration, Discontinuty
Late Miocene, Spain, Tertiary Duero Basin, Alteration, Discontinuty
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