stress		A type of fault when the hanging wall slips down relative to the footwall
reverse fault		A force that acts on rock to change its shape or volume
footwall		A type of stress that squeezes rock untill it folds or breaks
compression		A type of fault when rocks on either side slip past each other
tension		A block of rock that lies below on a fault
strike-slip fault		A block of rock that lies above on a fault
shering		A fold in rock that bends upward into an arch
normal fault		A type of stress that pulls on the crust, stretching rock so that it becomes thinner in the middle
hanging wall		A fold in rock that bends downward to form a valley
syncline		A type of fault when the hanging wall moves up relative to the footwall
anticline		A type of stress that pushes a mass of rock in two opposite directions