Their was a lot of sediments filled in the Tethys sea. It was the deepest ever sea and was narrow. Leaving whole of the volume of Tethys sea their was land mass. File:History of Geography.jpg due to conventional currents the earth shaked and their became crackes in the earth's surface. the water ran towards that side and water spread in the cracks but the force of the water was so much that it teared it of into continents. by that shakings some gases mixed and by that oxygen mixed with carbon dioxide and some natural substances to make more water. By that only the water increases in the Tethys sea. Nowadays scientists are looking for that natural substance to end the problems of loss of water, etc.