Monday, 12 August 2013

The Grand Canyon

The Grand Canyon is a famous, steep-sided canyon carved by the Colorado River in the United States in the state of Arizona. The Grand Canyon is considered one of the Seven Natural Wonders of the World. The Grand Canyon became a national monument in 1908, but wasn't designated as a national park until 1919.

The Grand Canyon is 446 km long, up to 29 km wide and attains a depth of over 1,800 meters.
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 by tectonic action.

Evidence suggests the Colorado River established its course through the canyon at least 17 million years ago. Since that time, the Colorado River continued to erode and form the canyon to the point we see it at today.

Many people come from around the world to visit the Grand Canyon. People can also take trips floating on the Colorado River in boats and rafts. Some people like to hike in the Grand Canyon.