MOUNTAINS

PRERNA FOR IAS

MOUNTAINS

1. Fold Mountains

Fold mountains are the most common and highest type of mountains on Earth. They are formed when two tectonic plates collide, causing layers of sedimentary rocks to compress, bend, and fold over millions of years. This process creates long mountain chains with rugged peaks and deep valleys. Fold mountains are generally young and continue to rise due to tectonic activity. They play an important role in influencing climate, river systems, biodiversity, and human settlements. Many of the world’s highest peaks are found in fold mountains. Examples include the Himalayas in Asia, the Andes in South America, and the Alps in Europe.

2. Block Mountains

Block mountains are formed due to faulting in the Earth’s crust. When tectonic forces create fractures called faults, large blocks of rock may either rise or sink. The uplifted blocks form block mountains, while the depressed portions become rift valleys. These mountains generally have steep sides and relatively flat tops compared to fold mountains. Block mountains are important geological features that provide evidence of crustal movements and tectonic activity. They often contain valuable mineral deposits and support diverse ecosystems. Famous examples include the Black Forest Mountains in Germany, the Vosges Mountains in France, and the Sierra Nevada in North America.

3. Volcanic Mountains