Towards a Plio-Pleistocene chronostratigraphy in Eastern Betic Basins (SE Spain) |
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Authors: | Teresa Bardaji José-Luis Goy Nils-Axel Mörner Cari Zazo Pablo-G Silva Luis Somoza |
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Institution: | 1. Dpto. de Geología, Fac, Ciencias, Universidad de Alcalá, 28871 Madrid (Spain).;2. Dpto. de Geología, Fac. Ciencias, Universidad de Salamanca. 37008 Salamanca (Spain).;3. Paleogeophysics &4. Geodynamics, Geological Institute. S-10691 Stockholm (Sweden).;5. Dpto. de Geologfa, Museo Nal. CC. Nat., C.S.I.C., José Gutierrez Abascal 2. 28006 Madrid (Spain). |
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Abstract: | AbstractThe evolution of Neogene and Quaternary littoral basins in the Eastern Betic Cordillera is largely related to tectonic activity along the Eastern Betic sinistral shear zone.Detailed mapping of sedimentary units in these basins, together with sedimentological and paleomagnetic analysis lead to the proposal of a new chronostratigraphie framework for Pliocene and Quaternary deposits.This chronostratigraphie setting rejects the synchronous character of the “Pliocene Unite” previously referred to as: “P.I” (grey-blue marls), “P.H” (yellow calcarenites), and “Р.Ш” (variegated silts and clays). Instead, tectonics would have controlled the paleogeographic evolution of the Eastern Betic realms, causing the lithofacies to occur repeated in space and time. The Plio-Pleistocene boundary in these basins is not accompanied by changes in geodynamic behaviour or climatic conditions. According to the paleomagnetic data, these changes occurred at different times during the Pleistocene in the different studied basins. |
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Keywords: | Plio-Pleistocene western Mediterranean Betic Cordilleras chronostratigraphy |
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