Fault+Basics

Fault Basics Fractures There are two kinds of fractures: faults and joints. Joints are cracks on the rock but there is no movement between those two rocks. On the contrary, faults are cracks on rocks that between the two rocks there is movement. Fault Plane The fault plane is where the fault is happening, the movement. Basically, the line that separates the two pieces of rock. Hanging Wall Hanging wall is the rock below the fault plane. When a normal fault happens, the hanging wall moves down; but in a reverse fault, the hanging wall moves up. Foot Wall Foot wall is the rock above the fault plane. When a normal fault happens, the foot wall moves up. In a reverse fault, the hanging wall moves down.

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