How do mountain ranges continue to rise after a continent-to-continent collision?

When two continents collide, neither plate easily sinks into the mantle because continental crust is relatively light. Instead, the crust crumples, folds, and thickens, forming large mountain belts and plateaus. This thickened crust is more buoyant and tends to rise isostatically, like a floating block with a deeper root. At the same time, erosion strips rock from the top, and that unloading can encourage additional uplift. The Himalayas and Tibetan Plateau are modern examples of this long-lived collision process between India and Eurasia.