Typically, a convergent plate boundary—such as the one between the Indian Plate and the Eurasian Plate forms towering mountain ranges, like the Himalaya, as Earth's crust is crumpled and pushed upward.
Accretion occurs as mantle is added to the growing edges of a plate, associated with seafloor spreading. This hot added material cools down by conduction and convection of heat. ... Mantle convection causes tectonic plates to move around the Earth's surface.