Publicación: Registro geológico de tsunamis en el SW Peninsular durante el Holoceno
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Fecha
2010
Autores
Zazo Cardeña, Caridad
Goy Goy, José Luis
Silva, Pablo Gabriel
Bardají Azcárate, Teresa
Cabero, Ana
Dabrio, Cristino José
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info:eu-repo/semantics/openAccess
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Desde la década de los 90 se ha incrementado el estudio de eventos marinos de alta energía que alcanzaron la costa del Golfo de Cádiz, principalmente con el estudio sedimentológico, paleontológico y geomorfológico de sus depósitos (en estuarios, marismas y flechas litorales). El estudio sedimentario y geomorfológico ha permitido identificar Eventos de Oleaje Extremo (Extreme Wave Events, EWE´s) asociados tanto a grandes tormentas como a tsunamis. Investigaciones recientes llevadas acabo en la plataforma del SW Peninsular han utilizado el registro de turbiditas como indicador de actividad paleosísmica. El registro de los eventos costeros y los de plataforma indican que al menos cinco tsunamis generados por grandes terremotos (Mw>7) afectaron a este área en los últimos 7000 años. El periodo de recurrencia de estos eventos catastróficos se ha calculado entre 1200 y 1500 años.
Many on-shore studies on high energy marine events have been carried out since the 90’s mainly based on sedimentary, paleontological and geomorphologic record of coastal lowlands (estuaries, marshlands, beach-barrier systems) from the Gulf of Cadiz. On-shore sedimentary and geomorphological records allow to identify Extreme Wave Events (EWE´s) assigned either to storms or tsunami events. Recent off-shore research in SW Iberia has considered turbidite occurrence as a proxy to recognize paleoearthquakes. Results from both on-shore and off-shore records suggest that almost five tsunami events generated by large earthquakes (Mw>7) occurred in this area during the last 7000 years. The recurrence interval of these catastrophic events is assumed to be 1200 to 1500 years.
Many on-shore studies on high energy marine events have been carried out since the 90’s mainly based on sedimentary, paleontological and geomorphologic record of coastal lowlands (estuaries, marshlands, beach-barrier systems) from the Gulf of Cadiz. On-shore sedimentary and geomorphological records allow to identify Extreme Wave Events (EWE´s) assigned either to storms or tsunami events. Recent off-shore research in SW Iberia has considered turbidite occurrence as a proxy to recognize paleoearthquakes. Results from both on-shore and off-shore records suggest that almost five tsunami events generated by large earthquakes (Mw>7) occurred in this area during the last 7000 years. The recurrence interval of these catastrophic events is assumed to be 1200 to 1500 years.
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Categorías UNESCO
Palabras clave
tsunami, registro geológico, periodo de recurrencia, eventos de oleaje extremo, geological record, recurrence interval, extreme wave events
Citación
Centro
Facultad de Ciencias
Departamento
Ciencias Analíticas
Grupo de investigación
Geología Aplicada al Medio Ambiente (GAMA)