Southern slopes of the Mahabharat Range are steep and nearly uninhabited due to a major fault system called the'Main Boundary Thrust ".
2.
The Lesser Himalayas lies in between the Sub-Himalayas and Higher Himalayas separated by the Main Boundary Thrust ( MBT ) and the Main Central Thrust ( MCT ) respectively.
3.
The northernmost boundary of the Siwaliks Group is marked by the Main Boundary Thrust ( MBT ), over which the low-grade metasedimentary rocks of the Lesser Himalaya overlie.
4.
The Shillong Plateau is an uplifted horst-like feature, bounded by the E-W Main Boundary Thrust ( MBT ) to the North, the N-S Jamuna fault in the west, and the NW-SE kopilli fracture zone in the east.
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