Grand canyon

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Grand Canyon

Hi! Today we are going to talk about the Grand Canyon, the unique combinations of geologic, colorful and erosional forms that decor a river of 277 miles length, and a mile deep.
TheGrand Canyon is a colorful steep-sided gorge carved by the Colorado River in the American state of Arizona. It is largely contained within the Grand Canyon National Park — one of the first nationalparks in the United States.
It is so impactful that President Theodore Roosevelt was a major proponent for the preservation of the Grand Canyon area, and visited it in several occasions to hunt andenjoy the scenery.
History:
The canyon was created by the Colorado River over a period of 6 million years. During prehistory, the area was habited by Native Americans who built settlements within thecanyon and its many caves. The people considered the Grand Canyon ("Ongtupqa" in Hopi language) a holy site and made pilgrimages to it
The first European known to have viewed the Grand Canyon wasGarcía López de Cárdenas from Spain, who arrived in 1540.
Weather
On SUMMER the temperatures on the South Rim are relatively pleasant. North Rim temperatures are a few degrees cooler due to the higherelevation. Inner canyon temperatures are extreme. Daytime highs at the river often exceed 105°F. Thunderstorms frequently occur during July, August, and early September. On winter conditions on theSouth Rim can be also extreme. The road into the North Rim is closed from the first heavy snow by the end of November to early December until mid May in SPRING and FALL. Come prepared for a variety ofconditions. Pleasant weather can change to rain or cold.  
Canyon fatalities
About 600 deaths have occurred in the Grand Canyon since the 1870s. Some of these deaths occurred as the result of overlyobsessive photographic endeavors, some other as the result of airplane collisions within the canyon, and some visitors drowned in the Colorado River. Many hikers who overestimate their fitness...
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