Resumen de Características mineralógicas de los sedimentos aluviales del Barranco Grande (Bardenas Reales de Navarra)

Joaquín Bastida Cuairan, María Cinta Osácar Soriano, Arsenio Muñoz Jiménez, Carlos Sancho Marcén

• Mineralogical composition of Holocene alluvial deposits from Bardenas Reales of Navarra is studied and compared h the Miocene mudrock substratum. An Early Holocene muddy-silty unit and another Middle-Upper Holocene sandy unit can be differentiated. Mineralogy semiquantitative results are compatible with weak weathering processes affecting the parents materials under humid conditions prior to Holocene. Besides, differences between alluvial units can be explained in terms of bedrock weathering, sedimentary features, recycling of sediments and pedogenetic processes.