Abstract
A detailed study of high-resolution (3.5 kHz) sub-bottom profiles reveals the presence of 17 different types of echo character (acoustic facies) in the recent sedimentary infill of the shallow Ria de Vigo (NW Spain). By correlating the echo character with surface sediments, we have been able to infer the recent sediment dynamics in the ria seafloor, 60.5% being related to modern depositional processes. In the outer ria area, where wave activity is strong, erosive and high-energy depositional processes dominate, whereas in the protected area of the inner ria the majority of recent processes are low-energy depositional, progradational and/or a combination of both.
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