Imprints of historical pollution and the 218-60 BCE tsunamigenic period in southwestern Spain

The Doñana National Park is a Biosphere Reserve located within the estuary of the Guadalquivir River (SW Spain). It is mainly composed of extensive fluvio-tidal marshes partially protected by an elongated sandy spit. Three phases have been distinguished in the late Holocene evolution of this spit ba...

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Detalles Bibliográficos
Autores: González-Regalado, María Luz, Monge, Guadalupe, Carretero, María Isabel, Pozo, Manuel, Rodríguez-Vidal, Joaquín, Cáceres, Luis Miguel, Abad, Manuel, Campos, Juan Manuel, Bermejo, Javier, Tosquella, Josep, Izquierdo, Tatiana, Prudêncio, Maria Isabel, Dias, Maria Isabel, Marques, Rosa, Gómez, Paula, Toscano, Antonio, Romero, Verónica, Ruiz, Francisco
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:México
Institución:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO
Repositorio:Revista Mexicana de Ciencias Geológicas
Idioma:inglés
OAI Identifier:oai:ojs.rmcg.geociencias.unam.mx:article/1543
Acceso en línea:http://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/1543
Access Level:acceso abierto
Descripción
Sumario:The Doñana National Park is a Biosphere Reserve located within the estuary of the Guadalquivir River (SW Spain). It is mainly composed of extensive fluvio-tidal marshes partially protected by an elongated sandy spit. Three phases have been distinguished in the late Holocene evolution of this spit based on textural, geochemical, palaeontological and, chronological data recorded in a long core (31 m). Phase 1 (890 BCE-218 BCE) is characterized by the alternation of lagoonal silty sediments and slightly polluted marsh deposits, the latter with contamination from thousand-year-old mining. Phase 2 (218 BCE-90 CE) is characterized by several historical tsunamis, which caused the erosion of previous dune systems and the deposit of these sandy sediments on the adjacent bottom of the lagoon. Phase 3 (90 CE-Present) includes a regressive sequence (lagoonal bottom-marsh-dune system), with the pollution of lagoonal sediments due to Roman mining activities.