In the structural geography of India, which geological formation separates the peninsular plateau block from the northern alluvial plains of the Indo-Gangetic basin?

💡 Solution & Explanation

The northern boundary of the Indian peninsular plateau is marked by a series of scarps and hill ranges, notably the Vindhyas, Kaimur, and Rajmahal hills, which overlook the downwarped foredeep filled by alluvial sediments of the Gangetic plain. The Main Boundary Thrust separates sub-Himalayan zones from lesser Himalayas. The Great Boundary Fault is a structural dislocation within Rajasthan, and the Palghat Gap is a major tectonic break in the southern Western Ghats.