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The Mediterranean and Black Seas are micro-tidal and less than 3 x 106 km2 and 500 km2 in area, respectively. The latter is connected to the Mediterranean Sea by the narrow Bosphorus-Dardanelles Strait. Both seas have an important continental influence because they are semi-enclosed basins with relatively large riverine sediment inputs. The most important fluvial systems flowing into the Mediterranean and Black Seas are the Ebro, Rhône, Po, Danube, and Nile Rivers (Figure 1). They represent the largest sediment contribution to Mediterranean margins.