Ancient petroglyphs on volcanic boulders in Arizona

By Reuters   |   26 April 2018   |   11:52 am  
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Ancient petroglyphs on volcanic boulders in Arizona
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Ancient petroglyphs on volcanic boulders in Arizona
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Paintings from ancient peoples cover these volcanic boulders from ancient volcanoes. Marking from the first Europeans, the Spanish, as well as modern Americans cover the boulders.
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