Respuesta estratigráfica a la Transgresión Tortoniense en el Margen Pasivo de la Cuenca del Guadalquivir: datos preliminares
- Autores: José Gabriel Pendón Martín, Manuel Abad de los Santos, Joaquín Rodríguez Vidal, Nieves López González, Francisco Ruiz Muñoz
- Localización: Geogaceta, ISSN 0213-683X, Nº. 38, 2005, págs. 167-170
- Idioma: español
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Resumen
The passive margin of the Guadalquivir foreland basin records different stages of evolution during the tortonian transgression, mainly determinate by sedimentary supply/ accommodation space ratio (A/S ratio, Cattaneo and Steel, 2003). In a first phase, a high supply from the continental and deltaic systems filled quickly the low accommodation space and produced an agradational/progradational stacking pattern of sequences. The second episode is characterized by a change in these conditions, so the passive margin register a high increase of depth and carbonate facies predominates. Finally, the transgressive maximum is registered by means of the formation of a condensed level constituted by glauconitic sands and silts. This transgressive pulse supposed the advance of the shoreline several kilometres towards the foreland.
