Lake Viedma
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Lake Viedma, approximately 50 miles (80 kilometers) long in extreme southwestern Argentina, is a major elongated trough lake formed from melting glacial ice (lake is located at ). The lake is fed primarily by the Viedma Glacier at the western end of the lake. The Viedma Glacier measures 3 miles (5 kilometers) wide at its terminus at Lake Viedma. The brown landscape resulted from ice scouring, which left virtually no vegetation on the steep-walled valleys.