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Implicaciones morfodinámicas de un proceso de construcción de crestas de tormenta en el NW de la Península Ibérica

Authors: Feal Pérez, A.; Blanco Chao, Ramón; Ferro Vázquez, María Cruz; Costa-Casais, Manuela; Martínez Cortizas, Antonio;

Implicaciones morfodinámicas de un proceso de construcción de crestas de tormenta en el NW de la Península Ibérica

Abstract

[ES] En este trabajo investigamos el origen de niveles de gravas, cantos y bloques situados en el techo de una secuencia sedimentaria Holocena y proponemos la interpretación paleoambiental de la misma. Estos niveles se encuentran entre 8 y 9 metros sobre el nivel actual de bajamar máxima viva equinoccial. Dos dataciones radiocarbónicas sitúan el inicio de esta sedimentación hace 1600 años. Este trabajo ejemplifica la evolución compleja de las costas rocosas del NW peninsular en el Holoceno final, durante el cual, el régimen del oleaje, el ascenso del nivel del mar, la exhumación de una plataforma rocosa y la disponibilidad de sedimento son los principales factores implicados. Este trabajo ha permitido identificar un proceso de construcción de crestas relacionado con la acción de las tormentas y el reajuste reciente del sistema a las condiciones actuales del nivel del mar que es sincrónico con el retroceso del acantilado.

[EN] This study investigates the origin and palaeoenvironmental interpretation of the sedimentary layers composed of gravels, pebbles and boulders at the top of a Holocene sedimentary sequence. The layers are located at heights of 8 - 9 m above the lowest low tide. Results suggest that these coarse-clastic levels were formed by a process of storm ridge construction during storm events. Radiocarbon dating revealed that this deposition started after 1600 yr BP and that it was synchronous with the cliff retreat. It is an example of a complex evolution in the Late Holocene in which wave regime, sea level rise, the exhumation of a rocky shore platform and the sediment supply were involved. This work allows the identification of a process of storm ridge construction related with storm activity and recent beach adjustment to the current sea level conditions.

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Spain
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Keywords

Rocky coasts, Holocene, Storm ridge, Instituto de Ciencias del Patrimonio, Cresta de tormenta, Cultural Heritage, Patrimonio cultural, Costa rocosa, Costa cantábrica, Costas rocosas, Insitute of Heritage Sciences, Institute of Heritage Sciences, Boulder beach, Incipit, Holoceno, Rocky coast, Playa de bloques, Cantabrian coast

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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