Petroglyph National Monument is on the west side of Albuquerque. The images were made by Ancestral Puebloans between roughly 400 and 3000 years ago.
The rocks are basalt, a volcanic rock that oxidizes to the dark color over millions of years. The images are made by removing the oxidation layer.
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| Looking east across Albuquerque at the Sandia Mountains |
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| Looking west at the remnants of the volcanoes that made the rocks the petroglyohs are carved in. |
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