Steven Dutch, Natural and Applied Sciences, University
of Wisconsin - Green Bay
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Occasionally waves attacking a narrow headland break through to create an arch. This arch is not on a seacoast, however, but in Lake Superior. It is located in Pictured Rocks National Lakeshore, Michigan. The rock is soft yellowish sandstone of late Precambrian age, about 700 million years.
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Created 25 November 2005, Last Update 04 December 2007
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