The area near the Utah-Arizona line is a place of strange and delightful rock formations. In the Paria Canyon-Vermillion Cliffs Wilderness, the renowned Wave formation is made of Jurassic-age Navajo sandstone -- 190-million-year-old sand dunes turned to rock. Stacked one atop another, the dunes calcified in vertical and horizontal layers.(Spencer Weiner / Los Angeles Times)
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