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Houghton's Petroglyph

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  • + rmdejonge Institute of Megalithic Research 1 month ago
    Fig.1 The main petroglyph near Houghton. The vertical lines should be numbered from left to right, #1, #2, and #3, and next the other lines from bottom to top, #4 and #5. (2500-1200 BC, Keweenaw Peninsula, Michigan. Photo by R.J. Wheeler)
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Houghton's Petroglyph - Presentation Transcript

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SlideShare Zeitgeist 2009

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Fig.1 The main petroglyph near Houghton. The verti more

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