The Grand Canyon : Arizona
Grand Canyon National Park is the 15th oldest national park in the United States. Named a UNESCO World Heritage Site in 1979, the park is located in northwestern Arizona. The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often considered one of the Seven Natural Wonders of the World. The park covers 1,217,262 acres of unincorporated area in Coconino and Mohave counties.
Officially designated a national park in 1919, though the landmark had been well known to Americans for over thirty years prior. In 1903, President Theodore Roosevelt visited the site and said: "The Grand Canyon fills me with awe. It is beyond comparison—beyond description; absolutely unparalleled through-out the wide world... Let this great wonder of nature remain as it now is. Do nothing to mar its grandeur, sublimity and loveliness. You cannot improve on it. But what you can do is to keep it for your children, your children's children, and all who come after you, as the one great sight which every American should see."
The Grand Canyon, including its extensive system of tributary canyons, is valued for its combination of size, depth, and exposed layers of colorful rocks dating back to Precambrian times. The canyon itself was created by the incision of the Colorado River and its tributaries after the Colorado Plateau was uplifted, causing the Colorado River system to develop along its present path.
The primary public areas of the park are the North and South Rims of the Grand Canyon itself. The rest of the park is extremely rugged and remote, although many places are accessible by pack trail and backcountry roads. Only the Navajo Bridge near Page connects the rims by road in Arizona; this journey can take around five hours by car. Otherwise, the two rims of the Canyon are connected via the Mike O'Callaghan–Pat Tillman Memorial Bridge and the Hoover Dam.
The park headquarters are at Grand Canyon Village, not far from the south entrance to the park, near one of the most popular viewpoints.
- Geo-Historical Text : Wikipedia
- Calculations : WolframAlpha Pro
- Satellite Imagery: ESRI ArcGIS
Overlay Source Image: NASA Johnson