During which period of orogeny were the Himalayas formed ? Name the three ranges that form a part of the Himalayan chain.
Himalayas were formed in Oligocene times but its second and third upliftments started in Miocene and post-Pliocene times respectively.
Ranges:
a. Inner Himalayas or the Great Himalayas.
b. The Lesser or the Middle Himalayas.
c. The outer or the Shiwalik Range.