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Petroglyph National Monument image of volcanoes and flowers
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Petroglyph National Monument
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Volcano and blue sky

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An Arizona walnut tree

Did You Know?
Walnut Canyon National Monument's name came from the Arizona walnut, a tree once common in the canyon bottom. It is less so now, because dams constructed upstream have decreased water flow through the canyon.

Last Updated: September 22, 2006 at 08:30 MST