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The Grand Canyon [a] is a steep-sided canyon carved by the Colorado River in Arizona, United States.The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,093 feet or 1,857 meters).
The known human history of the Grand Canyon area stretches back 10,500 years, when the first evidence of human presence in the area is found. Native Americans have inhabited the Grand Canyon and the area now covered by Grand Canyon National Park for at least the last 4,000 of those years.
Grand Canyon National Park is a national park of the United States located in northwestern Arizona, the 15th site to have been named as a national park.The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often considered one of the Wonders of the World.
Download as PDF; Printable version ... History of the Grand Canyon and Grand Canyon National Park — in northern Arizona. ... Wikipedia® is a registered trademark ...
When Fletcher conducted the trip in 1963, the National Park did not encompass the entire length of the canyon, the park was later expanded to include the entire Canyon. The first person to walk the entire length of the Grand Canyon was Kenton Grua in 1977. He was inspired by Fletcher's book but set out to "do it right" by walking from end to ...
John Harvey Butchart (May 10, 1907 – May 29, 2002) was an American hiker and mathematican who was well known for his exploits in and around the Grand Canyon in Arizona, United States. Beginning in 1945, Butchart explored the Grand Canyon's backcountry on foot. He wrote extensively about his adventures and influenced generations of canyoneers.
The Grand Canyon National Park Act, 65th Congress, was the U.S. federal law that established Grand Canyon National Park as the nation's seventeenth national park. It was signed into law on February 26, 1919, by President Woodrow Wilson .
Gilbert's wide-ranging scientific ideas were so profound that the Geological Society of America published GSA Special Paper 183 on his research (Yochelson, E.L., editor, 1980, The Scientific Ideas of G.K. Gilbert, fourteen separate biographical chapters, 148 pages).