Processes of Mountain Building

Mountains

Mountains have been around for millions of years. Their size and age make it hard for us to determine how they form. Each mountain is unique. Some might form the same way, but each is different. There are three different processes of how mountains are formed. Fold, Block, and Volcanic.

Three Processes

Fold: When plates collide or undergo subduction, the plates tend to buckle and fold, forming mountains.


Block: When a fault bloke is raised or tilted, block mountains are the result. The spreading apart of the surface causes tensional forces. When the tensional forces are strong enough to cause a plate to split apart, it does so and that a center block drops down relative to its flanking blocks.


Volcanic: Volcanic Mountains are formed when magma deep within the Earth, erupts, and piles upon the surface. Magma is called lava when it breaks through the Earth's crust. When ash and lava cools, it builds a cone of rock. The volcanoes can be shield volcanoes.