1. Fault Types
~Notes~

2. Fault
= a break in earth’s crust where rock surfaces slip past each other.

3. Usually occur along plate boundaries, where the forces of plate motion cause the crust to break.
Southern California

4. Normal Fault
Tension (pull apart) • Fault is at an angle • Hanging wall slips down footwall • Where crust diverges (or pulls apart).
Hanging wall
Foot wall

5. What are a “hanging wall” and “footwall?”

6. Normal Fault

10. Reverse Fault
Compression (push together) • Same structure as a normal fault, but opposite movement • Hanging wall slides up footwall • Where crust converges (pushes together).
Hanging wall
Foot wall

11. Reverse Faults

12. Strike-Slip Fault
Shearing motion • Rocks on either side slip past each other sideways • Transform (sliding) movements • Ex. San Andreas Fault in CA.

13. Strike-Slip Fault

14. Can you spot the faults?