Earths Crust in Motion Stress in the Crust Earthquake is the shaking and trembling that results from the movement of rock beneath Earths surface. Types of Stress 1.Shearing 2.Tension 3.Compression Types of Stress Faults 1.Strike-Slip Fault 2.Normal Fault 3.Reverse Fault Strike-Slip Fault Stress that causes Strike-Slip Faults: Shearing Strike-Slip Fault Example The San Andreas Fault in California. Normal Fault Stress that causes Normal Fault is: Tension Normal Fault Example The Sandia Mountains in New Mexico were created by a Normal Fault. Reverse Fault Stress that causes a reverse fault: Compression Reverse Fault Example Mt Gould in Glacier National Park Friction Along Faults Little Friction- quicker movement, less force to overcome friction. More Friction- stress must build up to move one plate past another. When stress is released more powerful earthquake can result. Mountain Building Mountains Formed by Faulting. Fault Block Mountains- Teton Range Wyoming (2 normal faults) Mountains by Folding Folds are bends in rock that form when compression shortens and thickens part of Earths crust Folded Mountains Example: Himalayas and Alps Anticlines and Synclines Examples of Anticlines and Synclines Anticline-Black Hills South Dakota Syncline-Illinois Basin South Dakota Plateau Example- Colorado Plateau including Four Corners (Arizona, Utah Colorado, New Mexico)