Faults come in all sizes and shapes; the largest fault in the continental US is the San Andreas (1 2 3 4) fault system in California; it is a Strike-Slip fault and is the result of two plate boundaries moving past each other. There are many varieties of faults. Faults may also be of the normal variety where the hanging wall has dropped relative to the foot wall or a Reverse fault where just the opposite has occurred. Other types of faults include Horst-Graben faults and Thrust faults.