Geomorphology of the Avilés Canyon System, Cantabrian Sea (BayofBiscay)
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AuthorsGómez-Ballesteros, M. (María); Druet-Vélez, M. (María); Muñoz, A.; Arrese-González, B. (Beatriz); Rivera, J. (Jesús); Sánchez-Delgado, F. (Francisco); Cristobo, J. (Javier); Parra-Descalzo, S. (Santiago); García-Alegre-Garralda, A. (Ana); González-Pola, C. (César); Gallastegui, J.; Acosta-Yepes, J. (Juan)
KeywordsAviles Canyon System, La Gaviera and El Corbiro, Geomorphology, Cantabrian Margin (Bay of Biscay), Multibeam bathymetry, Sediment transport.
The Avilés Canyon System (ACS) is a complex, structurally-controlled canyon and valley system constituted by three main canyons of different morphostructural character. They are, from east to west: La Gaviera Canyon, El Corbiro Canyon and Avilés Canyon. In addition to this ACS, a new canyon has been surveyed: Navia Canyon. We present for the first time a high resolution multibeam map showing with great detail the morphological and structural complexity of this segment of the Cantabrian margin. ACS presents a tectonic imprint marked by NW-SE, NNE-SSW and E-W structures. The morphology of their reaches as well as their single mouth, in addition to some rock dredges in their major valleys, demonstrates active down-slope flushing. The continental shelf shows a flat, uniform slope with local and well defined rock outcrops south of Aviles Canyon head. Sedimentary zones are limited, showing thin unconsolidated sedimentary cover. Strong continental margin water dynamics avoid ...
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