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Seafloor geomorphology of the Passage of Lanzarote (West Africa Margin): Influences of the oceanographic processes
Vázquez, J.T.; Palomino, D.; Fernández-Puga, M.C.; Fernández-Salas, L.M.; Fraile-Nuez, E.; Medialdea, T.; Sánchez-Guillamón, O.; Somoza, L.; SUBVENT team (2014). Seafloor geomorphology of the Passage of Lanzarote (West Africa Margin): Influences of the oceanographic processes, in: Van Rooij, D. et al. (Ed.) Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication, 69: pp. 125-126
In: Van Rooij, D.; Rüggeberg, A. (Ed.) (2014). Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication, 69. Ghent University, Department of Geology and Soil Science/Flanders Marine Institute (VLIZ): Oostende. xviii, 152 pp., more
In: VLIZ Special Publication. Vlaams Instituut voor de Zee (VLIZ): Oostende. ISSN 1377-0950, more

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Keywords
Author keywords
    Seafloor morphology; Bottom-current interaction; West Africa Margin

Authors  Top 
  • Vázquez, J.T.
  • Palomino, D.
  • Fernández-Puga, M.C.
  • Fernández-Salas, L.M.
  • Fraile-Nuez, E.
  • Medialdea, T.
  • Sánchez-Guillamón, O.
  • Somoza, L.
  • SUBVENT team

Abstract
    The seafloor morphology of the Passage of Lanzarote has been analysed with the aim to know the active processes on the bottom surface related to the oceanographic context. Multibeam bathymetric data and high and very high resolution seismic profiles obtained in the SUBVENT2 cruise have been used. Five main morphological groups have been analysed: (a) Volcanic or diapiric submarine hills; (b) Tectonic features on the continental slope (linear scarps and a rhombohedral depression) related to normal faults; (c) Submarine venting at top of diapirs initially triggered circular depressions; (d) Sedimentary instabilities (gullies, canyons, mass transport deposits) are present specially on the Fuerteventura-Lanzarote ridge; and (e) Contouritic bottom features both erosive (central valley, marginal valleys) and depositional (plastered drifts) are on the central part of the passage, and are generated by the interaction of MW and the interface MW-AAIW with seafloor.

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