Analyze the tectonic genesis of major mountain systems: Assertion (A): The Alpine-Himalayan mountain belt comprises young fold mountains formed primarily by the tectonic collision of continental landmasses and closure of ancient Tethys ocean basins. Reason (R): Convergence between the Indian plate and Eurasian plate, as well as the African plate pushing into Europe, created extensive crustal shortening, thrust faulting, and dramatic uplift. Which of the following is correct?

💡 Solution & Explanation

The Alpine-Himalayan system represents the world's major young orogenic belt resulting from northward convergence of Gondwanaland fragments toward Laurasia during the Cenozoic era. The closure of the Tethys Sea and subsequent continental collision between India and Eurasia generated massive crustal thickening and nappes, directly explaining the genesis of the Himalayas and the Alps. Both the assertion and the reason are correct, with the latter providing the exact tectonic mechanism. Seismic activity remains high along these collisional plate boundaries today.