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Superior, Lake

Lake in the USA and Canada, the largest freshwater lake in the world, bordered on the w by Minnesota, on the n and e by Ontario, and on the s by Michigan and Wisconsin. The most westerly of the five Great Lakes, it connects to Lake Huron and the St Lawrence Seaway by the St Mary's River and the Soo (Sault Ste Marie) canals. A centre for commercial and recreational fishing, the lake is also a major commercial transport route, particularly for grain and iron ore from Duluth, Michigan, and Thunder Bay, Ontario. Area: 82,413sq km (31,820sq mi). Max. depth: c.1,300ft (400m).

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