Both catastrophic and gradual forces have been at work to form the American West's most famous landscapes. This episode looks at the greatest volcanic eruption in history that occurred near the San Juan Range of the Rocky Mountains, the staggering flood of 500 cubic miles of water that carved out the Washington Scablands, and the slow effects of wind erosion that has resulted in Monument Valley.moreless
Please read the following before uploading
Do not upload anything which you do not own or are fully licensed to upload. The images should not contain any sexually explicit content, race hatred material or other offensive symbols or images. Remember: Abuse of the TV.com image system may result in you being banned from uploading images or from the entire site – so, play nice and respect the rules!