Abstract
The Cap Creus and Lacaze-Duthiers canyons, cut on the narrow subsiding margin off the eastern Pyrenees, play an important role in downslope sediment transport in the northwestern Mediterranean. This conclusion is based on an evaluation of the surficial sediment distribution patterns, cores, direct visual observations of the sea floor made in 24 submersible dives and tight-grid seismic survey data. Down-canyon sediment movement (mostly by slump and gravity flow mechanisms) since the end of the Pliocene has resulted in the formation of the Catalonia Fan at the base of the slope west of the Rhone Cone.
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