what is its origin?
Beginning with small bands of nomadic hunter-gatherers, Native Americans have inhabited the Colorado River basin for at least 8,000 years. Between 2,000 and 1,000 years ago, the watershed was home to large agricultural civilizations—considered some of the most sophisticated indigenous North American cultures—which eventually declined due to a combination of severe drought and poor land use practices.
Colorado River
Beginning with small bands of nomadic hunter-gatherers, Native Americans have inhabited the Colorado River basin for at least 8,000 years. Between 2,000 and 1,000 years ago, the watershed was home to large agricultural civilizations—considered some of the most sophisticated indigenous North American cultures—which eventually declined due to a combination of severe drought and poor land use practices. Most native peoples that i
what is the second layer of the grand canyon made of It is made up of nearly 40 major sedimentary rock layers how many layers are there? 40 layers how did this form? By deposition  in warm, shallow seas and near ancient, long-gone sea shores in western North America. do the layers have any names? One of them is the Vishnu Basement Rocks where is this canyon located? Arizona, United States. how big is it? thermochronometry showws that it  reached a depth near to the modern depth by 20 Ma was it extended? The Kaibab Uplift, Monument Upwarp, the Uinta Mountains, San Rafael Swell, and the Rocky Mountains were uplifted, at least in part, by the Laramide orogeny. is there any river near to it? Yes the Colorado River
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Colorado River [SEP] Introduction
Beginning with small bands of nomadic hunter-gatherers, Native Americans have inhabited the Colorado River basin for at least 8,000 years. Between 2,000 and 1,000 years ago, the watershed was home to large agricultural civilizations—considered some of the most sophisticated indigenous North American cultures—which eventually declined due to a combination of severe drought and poor land use practices. Most native peoples that inhabit the region today are descended from other groups that settled there beginning about 1,000 years ago. Europeans first entered the Colorado Basin in the 16th century, when explorers from Spain began mapping and claiming the area, which became part of Mexico upon its independence in 1821.