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Manitoulin Island

Island in Lake Huron, Ontario, Canada

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Manitoulin Island, Ontario, Canada
NASA WorldWind · Public domain

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Geography and geology

The island has an area of 2,766 km2 (1,068 sq mi), making it the largest freshwater island in the world, the 174th largest island in the world and Canada's 31st largest island. The island separates the larger part of Lake Huron to its south and west from Georgian Bay to its east and the North Channel to the north. Manitoulin Island itself has 108 freshwater lakes, some of which have their own islands. Lake Manitou, at 104 km2 (40 sq mi), is the largest lake in a freshwater island in the world, and Treasure Island in Lake Mindemoya is the largest island in a lake on an island in a lake in the world. Motors are prohibited on boats on Nameless Lake. The island also has four major rivers: the Kagawong, Manitou River, Blue Jay Creek in Michael's Bay and Mindemoya rivers, which provide spawning grounds for salmon and trout. The Manitoulin Streams Improvement Association was formed in 2000 and incorporated in 2007. The organization rehabilitates streams, rivers and creeks on Manitoulin Island to improve water quality and the fisheries resource. The Manitoulin Streams Improvement Association has conducted enhancement strategies for the Manitou River and Blue Jay Creek. The association has rehabilitated 17 major sites on the Manitou River and three major sites on Blue Jay Creek; it has completed work on Bass Lake Creek and Norton's Creek. The organization plans to start work on the Mindemoya River in 2010. Although culturally and politically considered part of Northern Ontario, the island is physiographically part of Southern Ontario, an "eastward extension of the Interior Plains, a region characterized by low relief and sedimentary underpinnings". The island consists mainly of dolomite as it is a continuation of the Bruce Peninsula and Niagara Escarpment. This geological rock formation runs south into Niagara Falls and continues into New York. The "Cup and Saucer Trail", which climbs the escarpment, provides a lookout over the island.

Climate

Manitoulin Island experiences a humid continental climate (Dfb) with moderation from Lake Huron. The island experiences warm summers and cold winters. Manitoulin Island has a comparable climate to that of Hokkaido (hemiboreal/boreal climate), despite having a lower latitude compared to other boreal areas. The island is characterized by long stretches of marked seasonal differences.

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