Plateaus - geography.

Plateaus - geography. Tibetan Plateau Plateaus are relatively level regions that stand higher than the land around them. Tibet's vast plateau has an average altitude of about 4,500 meters (14,800 feet). About 50 million years ago, India collided with the rest of Asia, forming the Tibetan Plateau and the Himalayas (see Mountains Map Trek). This collision compressed and thickened the Earth's crust; in fact, ...