How were the Himalayas formed?

Different plates in the world

(Please read the blog from bottom to the top)The earth was composed of several giant plates called tectonic plates.The most accepted theory is thatIndia once belonged to an Island continent called Gondwanaland and was separated from the Eurasian continent by the primordial Tethyan ocean. One billion years ago, the Aravallis, whose eroded remnants are visible around Delhi, formed a chain higher than the Himalayas today. Over millions of years these mountains suffered the forces of erosion and their sediments were deposited in the Tethyan ocean. Then 140 million years ago, India began it's northward movement, on a collision course with the Eurasian continent.