Geomorphology of Ona Basin, southwestern Scotia Sea (Antarctica): Decoding the spatial variability of bottom-current pathways.
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AuthorsLópez-Quirós, A.; Lobo, F.J. (Francisco J.); Escutia, C.; García-Rodríguez, M. (Mariano); Hernández-Molina, F.J. (Francisco Javier); Pérez, L.F.; Bohoyo, F.; Evangelinos, D.; Salabarnada, A.; Maldonado, A. (Antonio); Naveira-Garabato, A.C. (Alberto C.)
Bottom -current circulation
Ona Basin, the westernmost oceanic basin in the southern Scotia Sea, is affected by the opposite flows of Circumpolar Deep Water (CDW) and Weddell Sea Deep Water (WSDW); thus , it represent s a key location for exploring seafloor morphologies influenced by bottom currents. The present study aims to capture the spatial arrangement of recent subsurface contourite features , assuming a latitudinal influence of water masses and the interactions between along - and downslope processes, in order to contribute to the knowledge of regional deepwater flow pathways and to the sedimentary model of small sediment -starved oceanic basins. To this end, the investigation combine s an interpretation of multibeam bathymetry and parametric echo sounder seismic data complemented with hydrological data. The distribution of morpho -sedimentary features in Ona Basin reveals two major domains. The southern margin of the basin can be regarded as a mixed/hybrid system containing abundant sediment ...