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Ch 2 sect 1
Earth's crust in motion
Answer | Question |
---|---|
Stress | A force acting on a rock to change its shape or volume. |
Shearing | Stress that pushes masses of a rock in opposite directions. |
Compression | Stress that squeezes rock until it folds or breaks. |
Tension | Stress that stretches rock so that it becomes thinner in the middle. |
Deformation | Change in the volume or shape of Earth's Crust. |
Fault | A break in Earth's Crust Where slabs of Rock slip past each other. |
Strike-Slip Fault | A fault where rocks on either side 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. |
Foot wall | 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 in 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. |