Explanation:

Around 70 million years ago, the formation of the Himalayas was started.  There was a sea called Tethys sea where Himalayas stand today. The Tethys sea started to recede during the early Eocene period which was marked by the coming together of Indian and Asian plates. This trend of marine regression continued till the final emergence of the Himalayan Mountains by the end of the Tertiary Period. The rise of the Himalayas was accomplished in a series of five or more impulses, intervened by intervals of comparative quiescence. The collision of the Indian Plate with the Asian Plate retarded the pace of northerly drift of the Indian Plate. The drift direction slightly changed. The Indian Plate began its rotational movement, giving rise to the formation of the syntaxial bends at the northeastern and northwestern extremities of the Himalayan Mountains.