A fault is a fracture plane that accommodates the relative displacement of a pair of blocs. Dip slip and strike slip faults are the two main type of faults.
Fault types
In dip slip faults, the motion of the hanging wall relatively to the footwall occurs in a direction parallel to the dip of the fault plane. The footwall block stands underneath the fault plane, the hanging wall block stands above the fault plane.
In strike slip faults, the motion of a pair of block relatively to each others occurs in a direction parallel to the strike line of the fault plane.
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