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| Título: | Imaging the recent sediment dynamics of the Galicia Bank region (Atlantic, NW Iberian Peninsula) |
Autor: | Ercilla, Gemma CSIC ORCID ; Iglesias, Jorge CSIC; Juan, Carmen CSIC ORCID ; Estrada, Ferran CSIC ORCID CVN ; Farran, Marcel-lí CSIC; García, Marga CSIC ORCID | Palabras clave: | Geomorphology Sediment dynamics Mass-movements Contourites and bottom current circulation Hemi-pelagic processes Galicia Bank |
Fecha de publicación: | mar-2011 | Editor: | Springer Nature | Citación: | Marine Geophysical Researches 32(1-2): 99-126 (2011) | Resumen: | 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: downslope (mass transport, mass flows, turbidity flows), alongslope (bottom currents of Mediterranean Outflow Water, Labrador Sea Water, North Atlantic Deep Water, and Lower Deep Water), vertical settling, and the interplay between them. The architectural and sediment dynamic complexities, for their part, are conditioned by the morphostructural complexity of the region, whose structures (exposed scarps and highs) favor multiple submarine sediment sources, affect the type and evolution of the mass-movement processes, and interact with different water masses. This region and similar sedimentary environments far from the continental sediment sources, as seamounts, are ideal zones for carrying out submarine source-to-sink studies, and can represent areas subject to hazards, both geologic and oceanographic in origin | Descripción: | Gemma Ercilla ... et al. -- 28 pages, 10 figures, 3 tables | Versión del editor: | https://doi.org/10.1007/s11001-011-9129-x | URI: | http://hdl.handle.net/10261/46130 | DOI: | 10.1007/s11001-011-9129-x | ISSN: | 0025-3235 | E-ISSN: | 1573-0581 |
| Aparece en las colecciones: | (ICM) Artículos |
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