How the Himalayas Formed: A Complex Mountain System

The Himalayas are the archetypal complex mountain system, created by the ongoing collision of the Indian and Eurasian tectonic plates.

Formation Stages

1. Continental Drift (~50 Ma): Indian Plate, once part of Gondwana, raced northward.
2. Collision & Subduction: Indian Plate dove under Eurasian Plate, causing the Eurasian edge to buckle and uplift.
3. Folding & Thrusting: Ocean-floor sediments crumpled into massive folds and thrust sheets, forming high ranges and deep valleys.
4. Metamorphism & Erosion: Heat/pressure transformed rocks; rivers carved the dramatic topography we see today.
5. Ongoing Activity: Convergence continues (~5 cm/yr), driving uplift and frequent earthquakes.

Result: the world’s highest peaks (Everest, K2), deep gorges, and a geologically young, active range still rising.