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Title

Giant depressions on Atlantic continental margins: Relationship with diapirs

AuthorsVázquez, J. T.; Ercilla, Gemma ; Somoza, Luis; Palomino, Desirée; Alonso, Belén ; Casas, David ; Estrada, Ferran ; Fernández-Puga, M. C.; Fernández-Salas, L. M.; León, Ricardo; López-González, Nieves; Medialdea, Teresa; Sánchez-Guillamón, O.
KeywordsNorth Iberian Continental Margin
Diapirs
Depression
Geomorphology
West Africa Continental Margin
Issue Date4-Sep-2018
PublisherUniversidade de Coimbra
CitationIX Simpósio sobre a Margem Ibérica Atlântica : Livro de Atas: 251-252 (2018)
IX Simposio sobre el Margen Ibérico Atlántico : Libro de Actas: 251-252 (2018)
IX Symposium on the Iberian Atlantic Margin : Book of Proceedings: 251-252 (2018)
AbstractSeveral giant circular-elliptical depressions have been analyzed in the continental margins off North Iberian (NICM) and West Africa (WACM) by means of multibeam bathymetric data and seismic reflection profiles. Their long axes vary between 2 and 4.7 km, the width axis between 2 and 3.5 km and their reliefs between 40 and 370 m. Depressions are slightly elliptical with eccentricity index between 0.73 and 0.9. They are partially filled by sediments producing different V and U bathymetric crosssections. The Burato Ergap depression in the NICM and the Twin Pools depressions in the WACM occur overlying diapirs. Burato Ergap depression is originated as a collapse structure related to underlying diapiric mobility. Twin Pools depressions seem to represent seafloor reworking by the action of deep sea bottom currents interacting with and adjacent diapiric ridge on the seafloor
DescriptionIX Simpósio sobre a Margem Ibérica Atlântica (MIA 2018) - IX Simposio sobre el Margen Ibérico Atlántico - IX Symposium on the Iberian Atlantic Margin, 4-7 September de 2018, Coimbra.-- 2 pages, 1 figure
Publisher version (URL)https://mia2018univcoimbra.wixsite.com/mia2018esp/copia-copia-introduccion
URIhttp://hdl.handle.net/10261/192601
Identifiersisbn: 978-989-98914-2-5
Appears in Collections:(ICM) Libros y partes de libros
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