Grand Canyon is a steep canyon cliffs, carved by the Colorado River, in northern Arizona. This canyon is one of seven wonders `Into the World and mostly located in the Grand Canyon National Park, one of the first national parks in the United States. President Theodore Roosevelt is one of the main supporters of the Grand Canyon area, visiting on numerous occasions to hunt mountain lion and enjoy the incredible natural scenery.
This canyon, created by the Colorado River cutting a strait for
millions of years, the length of approximately 446 km, with a width
ranging from 6 to 29 km and a depth of more than 1,600 m. Nearly 2000
million years of Earth history has been truncated by the Colorado River
and its tributaries layer after layer of sediment as the Colorado
Plateau began to rise.
Grand Canyon was first seen by Europeans in 1540,
García López de Cárdenas from Spain. The first scientific expedition to
the canyon was led by U.S. Major John Wesley Powell in the late 1870s.
Powell pointed to the sedimentary rocks exposed in the canyon as “leaves
in a great story book”. However, long before that time, this region has
been inhabited by Native Americans who built a residence in the walls
of this canyon.
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