The Slate Islands are a small archipelago in Lake Superior, Ontario, Canada, about 12 kilometres south of the town of Terrace Bay. The island group, consisting of 15 islands in total, was created by a meteorite impact which formed a crater about 32 km wide. In 1985, the Ontario government established the Slate Islands as a natural environment provincial par…The Slate Islands are a small archipelago in Lake Superior, Ontario, Canada, about 12 kilometres south of the town of Terrace Bay. The island group, consisting of 15 islands in total, was created by a meteorite impact which formed a crater about 32 km wide. In 1985, the Ontario government established the Slate Islands as a natural environment provincial park. The islands are notable for having Ontario's largest herd of boreal woodland caribou.
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