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The Grand Canyon is a river valley in the Colorado Plateau that exposes uplifted Proterozoic and Paleozoic strata, and is also one of the six distinct physiographic sections of the Colorado Plateau province.

Heavy rains are common on both rims during the summer months.

However, the Grand Canyon is known for its visually overwhelming size and its intricate and colorful landscape.

Geologically, it is significant because of the thick sequence of ancient rocks that are well preserved and exposed in the walls of the canyon.

The higher elevation has also resulted in greater precipitation in the Colorado River drainage area, but not enough to change the Grand Canyon area from being semi-arid.

The uplift of the Colorado Plateau is uneven, and the Kaibab Plateau that Grand Canyon bisects is over one thousand feet (300 m) higher at the North Rim (about 1,000 ft or 300 m) than at the South Rim.

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