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Petroglyphs confirmed to be really old!

Have you seen petroglyphs in Zion National Park and elsewhere and wondered how old they were? Their ages vary, of course, and some may be of recent origin. Others, however are truly very old. A new high-tech analysis led by a University of Colorado Boulder researcher shows the oldest known petroglyphs in North America, which are cut into several boulders in western Nevada, date to at least 10,500 years ago and perhaps even as far back as 14,800 years ago. The petroglyphs located at the Winnemucca Lake petroglyph site 35 miles northeast of Reno consist of large, deeply carved grooves and dots forming complex designs on several large limestone boulders that have been known about for decades, said CU-Boulder researcher Larry Benson, who led the new effort. Although there are no people, animals or handprint symbols depicted, the petroglyph designs include a series of vertical, chain-like symbols and a number of smaller pits deeply incised with a type of hard rock scraper.

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Publication Date: Wed, 14 Aug 2013 06:24:00 EST
Source: Environmental News Network
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