About National Geographic
Rising in Utah’s high plateau country, the Virgin River carves its way to the desert below through a gorge so deep and narrow that sunlight rarely penetrates to the bottom. As the canyon widens, the river runs a gantlet of great palisade walls rimmed with slickrock peaks and hanging valleys.
A million years of flowing water has cut through the red and white beds of Navajo sandstone that form the sheer walls of Zion. The geologic heart of the canyon began as a vast desert millions of years ago; almost incessant winds blew one dune on top of another until the sands reached a depth of more than 2,000 feet. You can still see the track of these ancient winds in the graceful crossbedded strata of Zion’s mighty cliffs.
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