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Lake Superior Beach Stones,
Upper Peninsula, Michigan
This photograph of multicolored beach pebbles just under the water of Lake Superior was made at Point Huron on Michigan's Upper Peninsula. The wide variety of rock types and colors seen here is a reflection of the region's glacier-ground past.
Lake Superior, the world's largest body of fresh water (third largest in terms of volume), was carved out by Ice Age glaciers. With a maximum depth of 1,300 feet and an average temperature of 40 degree Fahrenheit, it is also the coldest, deepest, and cleanest of the Great Lakes.
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