Studies of Paleogene allow to interpret closure of the eastern Tethys and the age of initiate of a collision between India and Eurasia.Gyangzi area of southern Tibet is located in the northern subzone of Tethys-Himalaya, It belongs to the northern Indian continent. It is located in the southern Indus-Yarlung Zangbo Suture(IYZS), north of South Tibetan Detachment (STD) and High-Himalaya and west of Dingri and Gangba of Eastern Tethys. Gyachala Formation of Gyangzi area is the latest marine sequence, which co...