Dating grand canyon

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Visit our Grand Canyon Slideshow. Photo of the Grand Canyon courtesy of Carol M. Until recently, the Grand Canyonone of the most spectacular and mysterious natural wonders of the world, was thought to be about six million years old. With improved dating techniques, geologists now believe that it actually started to form some 17 million years ago.

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Determining the precise geologic history of the Grand Canyon has not been an easy task over the years. Rivers carve out canyons through erosion, a process that erases the physical evidence of their work. With no rock record left behind, scientists must look at the land formations that remain to reconstruct the history of such erosion.

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