This is a portion of the Loma Pietra earthquke fault near Santa Cruz, Calif.
Click on image for full size
Image courtesy of the American Geophysical Union
An Earthquake Fault is part of the process which causes volcanoes and continental drift. When the Earth's crust is pushed along, the rocky material of which it is made can sometimes break. When the crust breaks it is called a "fault". A fault is just like a fracture you can make in a block of clay when you push the block at the same time from opposite ends. Even though the Earth seems very hard, it is very much like a block of clay. The faults help scientist tell which way the Earth's crust is being pushed.
Types of earthquake faults are:
- the San Andreas Fault
- the East African Rift
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