Mountain ranges, consisting mainly of raised folded sedimentary rocks, are called Fold Mountains.
When these rocks are subjected
Due to horizontal compressive forces for millions of years, these rocks get bent into up and down folds.
This leads to the formation of anticlines and synclines. Such earth movements occur from time to time and lift the folds to a considerable height which results in the formation of Fold Mountains.
Some fold mountains of the world are the Himalayas (Asia), the Alps (Europe), the Rockies (North America) and the Andes (South America).
These are known as young fold mountains.
Some of these mountain ranges continue to rise, for example, the Himalayas.