What sequence of events led to the origin of the Himalayas in Asia?

The Himalayan mountain range in Asia formed as a result of the collision of the Indian tectonic plate and the Eurasian tectonic plate. The Indian tectonic plate was once a big island, but it started moving towards Asia, when it finally reached it they collided. Both of the plates have the same density, that resulted in none of them to be submerged, but instead to press against each other and thus start lifting the land. Over time the Himalayan mountain range formed, and till this day this process continues and it is still lifting up.