The Rocky Mountains:
1. The western part of the continent is occupied by long ranges of young folded mountains interspersed with high plateaus, narrow valleys and broad interior basins.
2. This mountain range extends for about 4800 km from Alaska in the North to the Panama Strait in the South.
3. The width varies from 110 to 480 Kms.
4. They are parallel ranges and are known as the Rockies in the east and the Coast Range Mountains in the west.
5. In Mexico, they are called Sierra Madre.
6. The Rockies and the Coast Range are together called the “Western Cordilleras”.
7. There are high intermontane plateaus between the ranges.
8. The prominent ones are the Mexican plateau, the Colorado Plateau and the Columbian plateau.