The Grand Canyon

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How erosion formed the Grand Canyon How erosion formed the Grand Canyon The Grand Canyon was created by the action of the Colorado River over about 6 million years of erosion. The Colorado River basin has developed in the past 40 million years and the Grand Canyon itself is probably less than 6 million years old. The formation of the Grand Canyon was accomplished by the constant erosion of the rock by the Colorado River over some 17 million years. Over time the river was able to carve a very deep channel into the Colorado Plateau. The rock layers in the Grand Canyon range from 250 million to about 2 billion years old. The exact reasons for creation of this astounding canyon are not known. Of course, there are many assumptions and theories. The erosive activity of the Colorado River is thought to be the prime cause for formation of the Grand Canyon. Certain other forces, like change in the Colorado River course, volcanism, continental drift, and the Earth's orbit. The formation of the Grand Canyon, the area was believed to be occupied by a chain of mountain ranges. These mountains, after a span of millions of years, had become plain due to erosion activities of water, ice, and wind. Meanwhile, due to the sudden climatic changes, the oceans moved over these areas and deposited rock layers. This process was repeated, resulting in the deposition of several rock layers. At times, the interval between two consecutive depositions was so fast that the upper layer usually got eroded completely by natural forces before the second layer was deposited. At this point of time, the ancestral Colorado River came into existence about 70 million years ago. In those times, the journey of the river was

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