April 14, 2012

Petrified Sand Dunes, Arizona

Photograph by Richard Barnes, National Geographic

This Month in Photo of the Day: Nature and Weather Photos

Sinuous lines of color swirl through the Wave, the most famous landform at Vermilion Cliffs National Monument. Flash floods carved this passage through petrified sand dunes, exposing the iron-rich bands.

See more pictures from the February 2012 feature story "Rock of Ages."

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