Fold mountains are formed due to mountain-building (erogenic) movements. Energy is transferred from the interior of the Earth. Because of these energy waves and pressure working towards each other and in horizontal direction, the layers of the soft rocks form folds. If the pressure is very high, large scale folds are formed and their complexity increases. As a result, the surface of the Earth gets uplifted and fold mountains are formed. The Himalayas, the Aravalis, the Rockies, the Andes, the Alps are the major fold mountains of the world.
