Folding (intermediate)

Folding (intermediate)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.

Geography

Keywords

folding, fold, syncline, fold mountain, mountain formation, vertical fold, overturned fold, recumbent fold, tectonic plate, rock layer, compressive force, rock, mountain, nature, geography

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Scenes

Folding

When more or less molten rock is affected by lateral compressive forces, the rock layers are pressed upwards and they form folds.
Sometimes the compressive forces are equal. When this occurs, a symmetrical fold is formed, also called a vertical fold. When the compression is stronger on one side, an overturned or recumbent fold is formed. The greater the difference, the more horizontal the fold becomes.
When the folds form a chain, fold mountain chains are created.

Definitions of terms:

Folding: a geological process, lateral compressive forces creating folds in the Earth's crust, resulting in folded structures.

Fold: the basic unit of the folding process

Fold mountains: mountains formed by the folding of early rock layers. During the orogeny its material was pressed into folds.

Vertical fold

Overturned fold

Recumbent fold

Animation

Narration

Lateral compressive forces acting on plastic rock cause the rock layers to move upwards or downwards and thus to form anticlines and synclines.

Sometimes the compressive forces are equal. When this occurs, a symmetrical fold is formed, this is also called a vertical fold.

When the compression is stronger on one side, an overturned fold is formed. The axis of overturned folds leans at a small angle from the vertical.

When one of the lateral forces is much greater than the other, the angle becomes greater too, and a recumbent fold is formed.

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Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.

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