What is the geographical environment of the Grand Canyon in the United States?

The Grand Canyon is located on the Colorado Plateau in Arizona, USA, and the Colorado River flows through it. This is a world-famous natural wonder. Because the Colorado River flows through here, it is also called the Colorado Grand Canyon. It is one of the natural heritages that UNESCO has chosen to protect. ***446 kilometers, the deepest part is about 1.6 kilometers, about 500 stories high, and the widest part is 13 kilometers. The history of the earth's development is engraved on its gorge wall-about one-third of the history of crustal changes is deeply recorded on the stone wall, and the rocks at the bottom of the valley have undergone about two billion years of changes, which is half the age of the earth.

The Grand Canyon of the United States is known as a "living geological history textbook" because of its representative geological fossils. Colorado Plateau is a typical "Table Mountain", also known as "Table Mountain", that is, a mountain with a flat top and steep sides. This terrain is formed by erosion (undercut and spalling). During the period of erosion, the hard rock strata on the plateau constitute the protective cap of the inter-valley area, and the erosion in the valley is active. The result is a platform mountain or fortress mountain.

The Grand Canyon is a masterpiece of the Colorado River. The river rises in the Rocky Mountains in Colorado, flows through Utah and Arizona, and enters the sea from California Bay in California. The total length is 2320 kilometers. Colorado means "Red River" in Spanish. This is because the river carries a lot of sediment, and the river is often red, so it is named.

The long-term scouring of the Colorado River, which runs day and night, sometimes cuts mountains and splits roads, and sometimes makes way for backflow. Black Canyon, Canyon Land, Glen Canyon, Bruce Canyon and other 19 canyons are carved in the upper reaches of the mainstream and tributaries. Finally, when it flows through the rocky Kaibabu Plateau in Arizona, it is even more amazing, forming the wonders of this grand canyon and becoming the "king of canyons" of all the canyons in this water system.

Due to the different stratum structure, the Grand Canyon is loose and dense, and the rivers are on the rampage, sometimes causing large-scale collapse, and sometimes leaving only a crack; Sometimes it stirs like a raging wave, and sometimes it erodes like a sawtooth; If the advection is slow, it will leave a gentle trace, and if the torrent rolls, it will produce abrupt ornamentation. As a result, this long canyon is a mixture of good and evil people, some wide and some narrow; Some are like honeycombs; Some are like ant nests; Some are as sharp as pagodas, and some are piled like bricks; Some of them are like a lonely mountain peak, while others are like natural caves. People named these masterpieces of nature according to their shapes and fairy tales, such as Apollo Temple, Di Anna Temple and Brahman Temple. The "Window of Angels" on the northern edge is a sky-high cave on the mountain, and the "Moral Point" on the southern edge is like the podium of an ancient general, especially the section of the valley wall strata, with clear texture and overlapping layers, just like a curve pattern composed of thousands of books, undulating along the mountain and extending along the valley, and like a Wan Li ribbon, just like a picture on the earth. At this point, tourists all admire the ingenuity of nature.

The color of the canyon varies with the types of rocks on the two walls, the degree of weathering, the evolution of time and the minerals contained. Under the irradiation of sunlight, iron ore is colorful, other oxides produce various dim tones, and quartzite is white. As a result, patches of red, one side deep, one side black, and pieces of iron ash were formed. The earth is like a huge colorful puzzle. Some of them are poetic because of the vegetation growing in the soil, and some are purplish because of the water mist at the bottom of the valley; Coupled with the weather changes, or direct sunlight, or wind and rain, or early morning, or sunset everywhere, can make the canyon scenery unpredictable and colorful.