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Sanilac Petroglyphs Historic State Park
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 in Greenleaf Township, Sanilac County, in Michigan's Lower Peninsula.
The carvings, known as petroglyphs, were discovered by residents after a fire swept through the area in 1881 and revealed rocks bearing the designs. 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, dating back to the Late Woodland Period. There is concern that without preservation, the carvings may be worn further away and lost.〔("Michigan's American Indian carvings in danger of fading away" ), ''The Detroit News'', 11 Jun 2005.〕
==The Petroglyphs==
The petroglyphs include depictions of swirls, lines, handprints, flying birds and bow-wielding men, likely carved over many years by unknown peoples passing by the site while traveling along the nearby Cass River on a sandstone rock in Sanilac County, Michigan between 300 and 1,000 years ago. The petroglyphs are the only known such carvings in the state of Michigan.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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