click below
click below
Normal Size Small Size show me how
Inside Earth 2:1
Ch. 2:1 Earth's Crust in Motion
Term | Definition |
---|---|
Stress | A force acting on a rock to make it change its shape or volume. |
Shearing | Stress that pushes masses of rocks in opposite directions. |
Compression | Stress that squeezes rock until it folds or breaks. |
Tension | Stress that stretches rock so that it become thinner in the middle. |
Deformation | A change in the volume or shape of Earth's crust. |
Fault | A breaking in Earth's crust where slabs of rock slip past each other. |
Strike-slip fault | A fault where rocks on either slide move past each other sideways with little up-or-down motion. |
Normal fault | A fault where the hanging wall slides downward; caused by tension in the crust. |
Hanging wall | The block of rock that lies above a fault line. |
Footwall | The block of rock that lies below the fault line. |
Reverse Fault | A type of fault where the hanging wall slides upward. |
Fault-block mountain | A mountain that forms where a normal fault uplifts a block of rock. |
Fold | A bend in rock that forms where part of Earth's crust is compressed. |
Anticline | An upward fold in rock formed by compression of Earth's crust. |
Syncline | A downward fold in rock formed by compression in Earth's crust. |
Plateau | A large area of flat land elevated high above sea level. |