Sanilac Petroglyphs Historic State Park

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Sanilac Petroglyphs Historic State Park is a state park in Michigan containing Michigan's only known rock carvings attributable to Native American Indians. The park consists of 240 acres in Michigan's Lower Peninsula.

The carvings, known as petroglyphs, were discovered by residents after a fire swept through the area in 1881. Because they are made in relatively friable sandstone, geologists have been able to determine that the carvings were made 300 to 1,000 years ago. There is concern that the carvings may be worn further away if some form of presevation is not undertaken.[1]

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