Here's why:
* Weathering: This refers to the breakdown of rocks, soil, and minerals through processes like freezing/thawing, wind abrasion, and chemical reactions.
* Erosion: This refers to the movement of weathered material by agents like water, wind, or ice.
Canyons are formed over long periods of time as rivers carve their way through rock, gradually deepening and widening the valley. The steep sides are a result of the resistant rock that forms the canyon walls.
Some famous examples of canyons include:
* The Grand Canyon in the United States
* The Yarlung Tsangpo Grand Canyon in Tibet
* The Fish River Canyon in Namibia
