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Jeffers Petroglyphs - Collection<br> Sightseeing in Minnesota picture - There are a dozen or so petroglyphs in this picture. Some are harder to see than others. All show the effects of as much as 5000 years of wear and tear.
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There are a dozen or so petroglyphs in this picture. Some are harder to see than others. All show the effects of as much as 5000 years of wear and tear.
North America
