High resolution seafloor images in the Gulf of Cadiz, Iberian margin

Type Article
Date 2007-11
Language English
Author(s) Hanquiez V1, Mulder T1, Lecroart P1, Gonthier E1, Marches E1, Voisset Michel2
Affiliation(s) 1 : Univ Bordeaux 1, CNRS, UMR 5805 EPOC, F-33405 Talence, France.
2 : IFREMER, Dept Geosci Marines, F-29280 Plouzane, France.
Source Marine Geology (0025-3227) (Elsevier), 2007-11 , Vol. 246 , N. 1 , P. 42-59
DOI 10.1016/j.margeo.2007.08.002
WOS© Times Cited 38
Keyword(s) Instabilities, Sedimentary processes, Acoustic facies, Deep towed SAR, Contourites, Mediterranean Outflow Water MOW, Gulf of Cadiz
Abstract In the Gulf of Cadiz, the hydrodynamic process acting on particle transport and deposition is a strong density-driven bottom current caused by the outflow of the saline deep Mediterranean water at the Strait of Gibraltar: the Mediterranean Outflow Water (MOW). New high resolution acoustic data including EM300 multibeam echo-sounder, deep-towed acoustic system SAR and very high resolution seismic, completed by piston cores collected during the CADISAR cruise allow to improve the understanding of the hydrodynamics of the MOW in the eastern part of the Gulf of Cadiz. Interpretation of data corrects the previous model established in this area and allows, for the first time, the accurate characterization of various bedforms and erosive structures along the MOW pathway and the precise identification of numerous gravity instabilities. The interaction between the MOW, the seafloor morphology and the Coriolis force is presently the driving force of the sedimentary distribution pattern observed on the Gulf of Cadiz continental slope.
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