Faults and Folds

1
Faults and Folds

• Cracks and bends in the Earths Crust are Caused
  by the Movement of Plates

2
Three Fault Types

• Normal Fault
• Caused by tensional forces
• Reverse Fault
• Caused by compressional forces
• Strike-Slip Fault
• Caused by shear forces

3
Animation of 3 fault types

• http//www-rohan.sdsu.edu/rmellors/lab8/l8maineq.
  htm

4
Compressional Force

• Causes
• Reverse Fault
• Folding
• Thrust Fault

5
Folded Mountains Video
6
Tensional Forces

• Cause
• Normal Faults
• Fault-Block Mountains
• Rift Valley

7
Fault Block Mountains Video
8
Shear Forces

• Cause
• Strike-slip faults

9
The San Andreas Fault