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Per the plate tectonics, Assam is in the easternmost projection of the Indian Plate, where it is thrusting underneath the Eurasian Plate creating a subduction zone. It is postulated that due to the northeasterly movement of the Indian plate, the sediment layers of an ancient geosyncline called Tethys (in between Indian and Eurasian Plates) have been pushed upward to form the Himalayas mountain range. Karbi Anglong plateau, which is situated to the south of the Kaziranga (along with the Khasi and Garo Hills) is originally part of the South Indian Plateau system. It is believed that due to the force exerted by the north-eastwardly movement of the Indian plate at the time of the Himalayan origin, a huge fault was created between the Rajmahal hills and the Karbi-Meghalaya plateau. Later, this depression was filled up by the depositional activity of numerous rivers. Today the Maghalaya and Karbi Anglong plateau remains detached from the main Peninsular block. Average height of this plateau varies from to .