All mountains are formed as result of violent changes in the Earth’s surface, most of which happened millions of years ago.
Folded mountains were made of rock layers that had been squeezed by great pressure into large folds.
In dome mountains, the rock layers were forced up to make great blister like domes on the surface of the Earth. In other cases it was the molten lava, coming with great pressure from the center of the Earth, which lifted these rock layers.
Fault mountains or Block mountains are the result of breaks, or faults in the Earth’s crust. Huge parts of the surface, including entire ‘blocks’ of rocks were raised up or tilted at one time.