• Fold mountains are formed when two plates collide head-on. The collision causes the crust to fold and buckle, creating long, narrow mountain ranges. The Himalayas are an example of fold mountains.
• Fault-block mountains are formed when two plates collide at an angle. The collision causes the crust to break and shift, creating large blocks of rock that are uplifted. The Sierra Nevada mountains in California are an example of fault-block mountains.
• Dome mountains are formed when magma rises from deep within the Earth's crust and pushes up the overlying rock. The Black Hills of South Dakota are an example of dome mountains.
• Volcanic mountains are formed when magma erupts onto the Earth's surface and builds up a cone-shaped mountain. Mount St. Helens in Washington state is an example of a volcanic mountain.
These four types of mountain landforms are all related to one another because they are all formed through the movement of tectonic plates. The type of mountain landform that is created depends on the type of collision that occurs between two plates.
