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Grand Canyon
JANUARY 2006
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Grand Canyon Map
 
How the Canyon Unfolds
A writhing giant with scores of limbs (some still unnamed), the Grand Canyon slices 277 miles (446 kilometers) through northern Arizona, extending 18 miles (29 kilometers) at its widest point and 6,000 feet (1,829 meters) at its deepest—one of Earth's largest canyon systems. Cut by the Colorado River in the past six million years, it exposes rock strata that detail nearly two billion years of North America's geologic history.


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