Note:Knowledge of the geometry, dynamics and ecology of carbonate-siliciclastic transitions is a useful tool for subsurface exploration and prediction of the impact of sediment runoff on carbonate reefs.After heavy rains at Barbados, fresh, sediment-laden water is debauched on to the east coast insular shelf. The coarse-grained material is transported as bedload on to the sand ramp, over the shelf break into deeper water or incorporated into the adjacent beaches. The fine-grained sediment is transported along the shore within a sediment plume. Material settling out of the plume is deposited on a spur and groove system, and deep water platform, and reefs of the northeast coast insular shelf. […]La connaissance de la géométrie, la dynamique e...