Respuesta estratigráfica a la Transgresión Tortoniense en el Margen Pasivo de la Cuenca del Guadalquivirdatos preliminares
- Pendón Martín, José Gabriel
- Abad de los Santos, Manuel
- Rodríguez Vidal, Joaquín
- López González, Nieves
- Ruiz Muñoz, Francisco
ISSN: 0213-683X
Any de publicació: 2005
Número: 38
Pàgines: 167-170
Tipus: Article
Altres publicacions en: Geogaceta
Resum
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.