Flexi Says: Mountain ranges form along ocean-continent and continent-continent convergent boundaries. Mountain ranges along ocean-continent boundaries typically include volcanic continental arcs, formed as magma rises from the region of the subducting plate over many thousands of years. Continental lithosphere is low in density and cannot subduct. So when two continental plates collide, they just smash together. Continent-continent convergence creates some of the world’s largest mountains ranges, including the Himalayas and Appalachian.
