Krakatoa was formed by the collision of both the Indian Ocean Plate and the Asian Plate. The volcano of Krakatoa was formed when the Indian Ocean Plate and the Asian Plate collided. There was so much pressure by the plates pushing against each other, that after thousands of years the land plates pushed up into a mountain. It erupted because of the massive amount of pressure from the magma flow that the whole volcano exploded. As a result of the whole volcano exploding the noise of the eruption was heard from thousands of kilometres away. Other examples of Continental Plates and colliding and forming of mountain and volcano's is the most obivious which is Mount Everest.