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Grand Canyon 43.jpg

A canyon (or gorge) is a big crack in the ground, or a very deep valley.[1] Most canyons are made by rivers. A few are made by earthquakes. They can be big, like the Grand Canyon, or small.

Canyons can be formed by erosion by running water which will take sediment (pieces of the earth) away and create a trench getting deeper until it forms a canyon.