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Faults faults are fractures (breaks) in rocks along which appreciable displacement has taken place types of faults dip-slip fault movement along the inclination (dip) of fault plane parts of a dip-slip fault Fall 2007 hanging wall – the rock above the fault surface footwall– the rock below the fault surface Providence College 1 concept of hanging wall and footwall along a fault Fall 2007 Providence College 2 types of faults normal fault hanging wall block moves down associated with fault-block mountains prevalent at spreading centers caused by tensional forces Fall 2007 Providence College 3 normal fault Fall 2007 Providence College 4 types of faults reverse faults hanging wall block moves up caused by strong compressional stresses Fall 2007 Providence College 5 reverse fault Fall 2007 Providence College 6 types of faults strike-slip faults dominant displacement is horizontal and parallel to the trend, or strike transform fault large strike-slip fault that cuts through the lithosphere often associated with plate boundaries Fall 2007 Providence College 7 strike-slip fault Fall 2007 Providence College 8
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