Supercontinents - Vaalbara to Pangaea

Subscribe – http://goo.gl/wpc2Q1 The theory of continental drift suggests that we go through cyclical phases of continental dispersion and collision, over hundreds of millions of years. The Earth, 3.4 billion years ago, plate tectonics pushes the protocontinents together. They combine to form ever larger tracts of land. Scientists suggest that cratons combine with other cratons to form a supercontinent, a huge continuous stretch of land, called Vaalbara. Clip taken from our documentary “Colliding Continents”. Watch it here – https://youtu.be/i8Zo1_FN6xw