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[[Image:Fault.jpg|thumb|300px|Aerial view toward the NE of the Pu`u Kapukapu fault scarp (maximum height about 320 m) in the Hilina fault system, south flank of Kilauea Volcano, Hawai`i. In Hawai`i, these tall cliffs are called "pali's".]]

[[Image:Fault.jpg|thumb|300px|Aerial view toward the NE of the Pu`u Kapukapu [[fault scarp]] (maximum height about 320 m) in the Hilina fault system, south flank of Kilauea Volcano, Hawai`i. In Hawai`i, these tall cliffs are called "pali's".]]

'''Faults''' are fractures or fracture zones in the [[Earth]]'s crust along which one side moves with respect to the other. A fault scarp is a cliff or steep slope that sometimes forms along the fault at the surface. There are many types of faults (for example, strike-slip, normal, reverse, and thrust faults) ranging in size from a few tens of meters to hundreds of [[kilometer]]s in dimension. When faults occur along crustal plate boundaries, such as with the San Andreas Fault in California, they are called ''transform boundaries''.

'''Faults''' are fractures or fracture zones in the [[Earth]]'s crust along which one side moves with respect to the other. A fault scarp is a cliff or steep slope that sometimes forms along the fault at the surface. There are many types of faults (for example, strike-slip, normal, reverse, and thrust faults) ranging in size from a few tens of meters to hundreds of [[kilometer]]s in dimension. When faults occur along crustal plate boundaries, such as with the San Andreas Fault in California, they are called ''transform boundaries''.