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Morfoestratigrafía y cronología de registros fluviales del Pleistoceno superior en Bardenas Reales de Navarra: implicaciones paleoambientales

2008; Issue: 45 Linguagem: Inglês

2173-6545

Carlos Sancho, Arsenio Muñoz Jiménez, Edward J. Rhodes, Eric V. McDonald, José Luis Peña, Gerardo Benito, Luis Alberto Longares Aladrén,

Mediterranean and Iberian flora and fauna

Quaternary gravel deposits covering the bottom of the Bardena Blanca depression (Central Ebro Basin, Navarra) have been studied. Three Late Pleistocene units (Qt1, Qt2 and Qt3) of gravel accumulation have been differentiated using geomorphologic mapping, sedimentological analysis and optically stimulated luminescence techniques. Chronological data show ages of 92, 52 and 15-21 ka respectively, which are closely related to cold climate signals at regional scale. Aggradation in braided channel systems was mainly controlled by increases in runoff and sediment supply.