Aberdeen, United Kingdom
Photograph - Photography
Rock layers across the Grand Canyon North Rim - Arizona, USA
The Grand Canyon is a steep-sided canyon carved by the Colorado River in the United States in the state of Arizona. It is contained within and managed by Grand Canyon National Park, the Hualapai Tribal Nation, and the Havasupai Tribe. It is considered one of the Seven Natural Wonders of the World.
The Grand Canyon is 277 miles long, up to 18 miles wide and attains a depth of over a mile. Nearly two billion years of the Earth's geological history have been exposed as the Colorado River and its tributaries cut their channels through layer after layer of rock while the Colorado Plateau was uplifted. Recent evidence suggests the Colorado River established its course through the canyon at least 17 million years ago. Since that time, the Colorado River has continued to erode and form the canyon to its present-day configuration.
For thousands of years, the area has been continuously inhabited by Native Americans who built settlements within the canyon and its many caves.
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July 30th, 2012
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