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Petroglyph National Monumentimage of volcanoes and flowers
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Petroglyph National Monument
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Volunteers taking photos of petroglyphs
Cliff Dwelling Wood  

Did You Know?
All of the wood seen in the Gila Cliff Dwellings today is original! Thirty-one core samples were taken from the wood. Dendrochronology (tree ring dating) indicates that the trees for the Cliff Dwellings were cut down from 1276 to 1287.

Last Updated: September 22, 2006 at 08:35 EST