Orogeny

The Processes of Mountain Formation

The Fold Process

Folded mountains are the result of the pushing together of part of the Earth's crust from the ends. When this happens, it causes the crust to fold and ripple in the middle, resulting in a "folded" mountain. A general explanation of this is that these solid rocks slowly folded, without cracking, over long periods of time.
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The Block Process

Block mountains are the result of enormous amounts of underground pressure forcing a whole rock mass to break away from another. The line at which the rock mass breaks is known as a fault. When the rock mass breaks, one side of the rocks rise, while the other side sinks down.
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The Volcanic Process

Volcanic mountains are formed when an explosion of material from deep within the Earth, which are in the form of enormous amounts of lava or cinders, pile up on the Earth's surface.
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