GEOLOGY

EARTH SCIENCE

EARTHQUAKES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A type of fault where the hanging wall slides down ____ caused by tension.
A
normal fault
B
strike-slip fault
C
reversynclinese fault
D
None of the above
Explanation: 

Detailed explanation-1: -If the hanging wall moves down relative to the footwall, the fault is a normal fault. Normal faults are caused by tensional stress, or stress that pulls rocks apart..

Detailed explanation-2: -Tensional faults are produced through tension (extension or pulling apart) of the crust causing the hanging wall to move down relative to the footwall.

Detailed explanation-3: -In terms of faulting, compressive stress produces reverse faults, tensional stress produces normal faults, and shear stress produces transform faults.

Detailed explanation-4: -Normal Faults: This is the most common type of fault. It forms when rock above an inclined fracture plane moves downward, sliding along the rock on the other side of the fracture. Normal faults are often found along divergent plate boundaries, such as under the ocean where new crust is forming.

Detailed explanation-5: -Fault: Normal In a normal fault, the block above the fault moves down relative to the block below the fault. This fault motion is caused by extensional forces and results in extension. Other names: normal-slip fault, tensional fault or gravity fault. Examples: Sierra Nevada/Owens Valley; Basin & Range faults.

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