The Main Boundary Thrust (MBT) in the geological structure of Uttarakhand separates which two major tectonic units?

💡 Solution & Explanation

The Main Boundary Thrust is a major tectonic fault that marks the boundary between the Lesser Himalaya and the underlying Shiwalik Sub-Himalaya. The boundary between the Higher Himalaya and Lesser Himalaya is demarcated by the Main Central Thrust, while the Himalayan Frontal Fault separates the Shiwaliks from the Indo-Gangetic plains. Understanding these thrust zones is vital for seismic zonation and tectonic studies of the Himalayan belt.