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There can never be TENSION in the Earth (gravity is squeezing the whole Earth up).

So no type of fault can be the product of tension.

Faults of varying varieties happen when the relative magnitude of the maximum and minimum compression forces change and or change direction.

Normally the vertical force (gravity) is the maximum force and transverse faults (with vertical fault planes) happen the ratio of the horizontal compressive forces (which are at tight angles to one another) exceeds the shear strength of the rock.

Normal faults occur when the ratio between the gravity and one or other of the horizontal forces exceeds the shear strength of the rock.

Reverse faults occur when the ratio between an horizontal force and the vertical force exceeds the shear strength of the rock.

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8y ago
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Q: What type of fault usually occuer because of tension?
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