Sand Ridges on the Mid-Outer Valencia Continental Shelf
A sand ridge field with crests oriented NE–SW (52°) located between 55 and 85 m water depth on the Valencia continental shelf (Spain) was mapped with multibeam swath bathymetry and characterized with high-resolution seismic reflection profiling and sediment sampling. Boundary layer hydrodynamic and suspended sediment concentration measurements conducted over a sand ridge at 66 m depth showed evidence of wave and current sediment resuspension during a major storm event. It is argued that these sand ridges developed in a shallow environment and there is no evidence of present-day ridge migration or morphological degradation.
KeywordsBedforms Sand ridge Sediment resuspension Continental shelf
This research was supported by the projects COSTEM (CTM2009-07806), BUS2 (CGL2011-22964) and FORMED (CGL2012-33989). We thank the captain and the crew of the R/V García del Cid and the Instrumental Service of ICM, J. Pozo and M. Lloret for their kind assistance. Puertos del Estado (Ministerio de Fomento) provided wave data information and the Subdirección General para la Protección de la Costa (Ministerio de Agricultura, Alimentación y Medio Ambiente) provided the stratigraphic results from vibrocores. G. Simarro was supported by the Spanish Government through the Ramón y Cajal programme. The studies of Dr M. Ribó were supported by an FPI doctoral grant (Ref. BES-201029949) from the Spanish Ministry of Economy and Competitiveness. R. Durán acknowledges a CSIC JAE-Doc contract co-funded by the FSE.
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