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The [[Tectonic Plate|tectonic plates]] theory speculates that some mountains rose out of the ground upon the collision of plates. These are called complex mountains, and example of which is the [[Himalayas]]. This theory cannot explain all mountains, however. Other types of mountains, such as fault-block mountains, are a result of faults pushing sections of land up higher than the surrounding areas.
The [[Tectonic Plate|tectonic plates]] theory speculates that some mountains rose out of the ground upon the collision of plates. These are called complex mountains, and example of which is the [[Himalayas]]. This theory cannot explain all mountains, however. Other types of mountains, such as fault-block mountains, are a result of faults pushing sections of land up higher than the surrounding areas.
Some mountains are [[Volcano|volcanoes]] (in some cases, extinct) and were formed by the accumulation of volcanic deposits around a central vent.
Young mountains tend to be larger than older ones. One theory is that the rugged appearance of a mountain is caused by [[Glacier|glacial]] action, pinching the rock of the mountain into faces and horns.
Young mountains tend to be larger than older ones. One theory is that the rugged appearance of a mountain is caused by [[Glacier|glacial]] action, pinching the rock of the mountain into faces and horns.