A river bed will gradually reach a baseline elevation, which is the same elevation as the body of water into which the river drains. Rivers have a natural tendency to cut through underlying surfaces, eventually wearing away rock layers as sediments are removed downstream. The Grand Canyon, Arizona, at the confluence of the Colorado River and Little Colorado RiverĪ canyon (from Spanish: cañón archaic British English spelling: cañon) or gorge is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales.
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