The record of a high-energy event in a mud entrapment on the inner shelf off the Guadiana river

Abstract

Reunião do Quaternário Ibérico (9º. 2017. Algarve)Recent environmental changes associated with high-energy events and human impacts were investigated in a mud entrapment confined in the paleo-Guadiana incised valley. Those changes were recorded in a gravity core during the last 2500 years. An erosional event seems to have occurred at ca. 500 cal yr BP but it is not clear how much sediment was removed. This event was followed by an increase in river discharges until ca. 465 cal yr BP while the benthic foraminiferal faunas were dominated by species associated with shallow-water sandy sediments. Upward, sedimentological and benthic foraminiferal variations indicated environmental changes, promoted by variable sediment supplies to the shelf.Centro de Investigação Marinha e Ambiental, Universidade do Algarve, PortugalInstituto Andaluz de Ciencias de la Tierra, Consejo Superior de Investigaciones Científicas, EspañaInstituto Andaluz de Ciencias de la Tierra, Universidad de Granada, EspañaGEOMAR Helmholtz Centre for Ocean Research Kiel, AlemaniaInstituto Geológico y Minero de España, EspañaSchool of Coastal and Marine Systems Sciences, Coastal Carolina University, Estados UnidosDepartment of Geosciences, University of Bremen, AlemaniaPeer reviewe