What are canyons?Howa are they formed?
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A valley, especially a long, narrow, steep valley, cut in rock by a river
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CANYON :
- When a gorge is very long and steep with almost vertical sides and flat bottomed river valley, it is called a canyon. eg. The Great Canyon of Colorado.
GORGE :
- When a river flows through a region of hard rock, it forms a deep narrow valley. If bed rock is hard, a rapid and vigorous down cutting may cause steep walled 'I' shaped valley called a gorge. eg. Kali Gandaki Gorge in Himalayas.
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