Structurally, mountains can be classified into four main types:
1) Fold Mountains: These mountains are formed when the Earth's tectonic plates collide and compress the rock layers, causing them to fold and rise upwards. Examples of fold mountains include the Himalayas and the Andes.
2) Fault Block Mountains: These mountains are formed when large blocks of the Earth's crust are uplifted along fault lines. The uplifted block is tilted, creating a steep slope on one side and a more gradual slope on the other. Examples of fault block mountains include the Sierra Nevada in the United States and the Black Forest in Germany.
3) Dome Mountains: These mountains are formed when magma from deep within the Earth rises and pushes up the overlying layers of rock, creating a rounded, dome-shaped uplift. Examples of dome mountains include the Adirondack Mountains in the United States and the Erongo Mountains in Namibia.
4) Volcanic Mountains: These mountains are formed when magma or lava from a volcano reaches the Earth's surface and accumulates, building up a cone-shaped structure. Examples of volcanic mountains include Mount Fuji in Japan and Mount Etna in Italy.
