= Dip-slip faulting
<Dip-slip faulting> is relative motion on a <geological fault> predominantly along the steepest direction within the fault plane. That direction is perpendicular to the <fault strike> and follows the <fault dip>. It differs from <strike-slip faulting>, whose motion is mainly along strike.
For an inclined plane, <normal faulting> lowers the <hanging wall> relative to the <footwall>; <reverse faulting> raises it. The surface step is only a projection of the full <fault slip>, so vertical offset alone is not the total displacement unless the geometry is known. Mixed motion belongs to <oblique-slip faulting>, and an observed <focal mechanism> must be interpreted with independent evidence for the actual fault plane.
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