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Title

Multiprocess interaction shaping geoforms and controlling substrate types and benthic community distribution in the Gulf of Cádiz

AuthorsLozano, Pablo; Fernández-Salas, Luis Miguel; Hernández Molina, F. Javier; Sánchez Leal, Ricardo; Sánchez-Guillamón, O.; Palomino, Desirée; Farias, Carlos; Mateo-Ramírez, Ángel; López-González, Nieves; García, Marga ; Vázquez, J. T.; Vila, Yolanda; Rueda, Jose L.
KeywordsMud volcanoes
Cold-water corals
Fluid venting
Contourite drift
Seafloor mapping
Issue Date30-Jan-2020
PublisherElsevier BV
CitationMarine Geology 423: 106139 (2020)
AbstractThe Iberian margin in the Gulf of Cádiz hosts a fluid venting area embedded into a contourite depositional drift and is a natural laboratory to study how multiple interacting processes shape the seafloor. A high-resolution morpho-sedimentary analysis, based on geophysical data, sediment samples and submarine imagery, has been carried out; the onset and evolution of the main geoforms are discussed; and the influence of geological, oceanographic and biogenic processes conditioning substrate types and benthic community distribution are evaluated. The interplay of geological (e.g., salt and shale diapirism, mud volcanism), oceanographic (e.g., water mass circulation, secondary circulation, vertical eddies, internal waves) and biogenic (e.g., methane derived authigenic carbonates formation, coral mound aggradations) processes drive the formation of a large variety of geoforms including, among others, contourite drifts, channels, diapiric ridges, mud volcanoes, pockmarks, and coral mounds. At a smaller scale, the interaction between massive and fluid extrusive, biogenic, and bottom current-related processes (both depositional and erosive) determines the distribution of substrate types and benthic communities, which have been classified as belonging to different biotopes.
Publisher version (URL)http://dx.doi.org/10.1016/j.margeo.2020.106139
URIhttp://hdl.handle.net/10261/216422
Identifiersdoi: 10.1016/j.margeo.2020.106139
issn: 0025-3227
Appears in Collections:(IACT) Artículos
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