Millions of years ago, a major geological event called continental drift occurred. Before this, the world as we know it did not exist. Instead, there were supercontinents, or very large land masses, that formed the continents we know today.
India was part of Gondwanaland (Gondoana), which included Australia, Africa, Antarctica, India and South America. About 150 million years ago, India separated from Gondwanaland and moved northward, approaching Eurasia. The Tethys Sea, which was located between two land masses, had a rich and diverse life.
It took about a hundred million years for the Eurasian and Indian continental plates to collide, but when they finally did, the collision was accompanied by such force that the dense crusts of both collided with enormous force and rose upward. It formed mountains that rose from the seabed. This is why there are marine fossils on the tallest mountain in the world.
