Imaging the recent sediment dynamics of the Galicia Bank region (Atlantic, NW IberianPeninsula)
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AuthorsErcilla, G.; Casas, D. (David); Vázquez, J.T. (Juan Tomás); Iglesias, J.; Somoza-Losada, L. (Luis); Juan-Valenzuela, C. (Carmen); Medialdea, T.; León, R.; Estrada, F.; García-Gil, S.; Farrán, M.; Bohoyo, F.; García, M.; Maestro, A.; ERGAP Project; Cruise Teams
Multibeam bathymetry, high resolution multi-channel, and very high resolution single-channel (3.5 kHz) seismic records were used to depict the complex geomorphology that defines the Galicia Bank region (Atlantic, NW Iberian Peninsula). This region (≈620–5,000 m water depth) is characterized by a great variety of features: structural features (scarps, highs, valleys, fold bulges), fluid dynamics-related features (structural undulations and collapse craters), mass-movement features (gullies, channels, mass-flow deposits, slope-lobe complexes, and mass-transport deposits), bottom-current features (moats, furrows, abraded surface, sediment waves, and drifts), (hemi)pelagic features, mixed features (abraded surfaces associated to mixed sediments) and bioconstructions. These features represent architectural elements of four sedimentary systems: slope apron, contouritic, current-controlled (hemi)pelagic, and (hemi)pelagic. These systems are a reflection of different sedimentary processes: ...