The Mediterranean is c.2,400 mi (3,900 km) long with a maximum width of c.1,000 mi (1,600 km); its greatest depth is c.14,450 ft (4,400 m), off Cape Matapan, Greece. It connects with the Atlantic Ocean through the Strait of Gibraltar; with the Black Sea through the Dardanelles, the Sea of Marmara, and the Bosporus; and with the Red Sea through the Suez Canal. Its chief divisions are the Tyrrhenian, Adriatic, Ionian, and Aegean seas; its chief islands are Sicily, Sardinia, Corsica, Crete, Cyprus, Malta, Rhodes, the Dodecanese, the Cyclades, the Sporades, the Balearic Islands, and the Ionian Islands. Shallows (Adventure Bank) between Sicily and Cape Bon, Tunisia, divide the Mediterranean into two main basins.
The sea is of higher salinity than the Atlantic and has little variation in tides. The largest rivers that flow into it are the Po, Rhône, Ebro, and Nile. The shores are chiefly mountainous. Earthquakes and volcanic disturbances are frequent. The region around the sea has a warm, dry climate characterized by abundant sunshine. Strong local winds, such as the hot, dry sirocco from the south and the cold, dry mistral and bora from the north, blow across the sea. Fish (about 400 species), sponges, and corals are plentiful. In addition, oil and natural gas have been found in several sections of the sea. The overuse of the sea's natural and marine resources continues to be a problem.
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