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18 Cards in this Set
- Front
- Back
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Deformation
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The bending, tilting, and breaking of the earths crust.
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Isostasy
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When weight is added to the crust, it sinks until a balance of the forces is reached again.
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Isostatic Adjustments
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The up-down movements of crust to reach Isostasy .
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Stress
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Stress is a force that casues pressure in the rocks of the crust. Example when the weight of the rocks of the sinking crust the pressure casues stress.
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Strain
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Strain is a change in the shape or volume of rocks that results from the stress of being squeezed, twisted, or pulled apart.
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Compression
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Occurs when crustal rocks are squeezed together .
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Tension
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Tension is the force that pulls the rocks in the crust apart.
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Shearing
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Shearing pushes rocks in opposite horizontal directions. Sheared rocks bend, twist, or break apart as they slide past eachother.
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Folding
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When a rock responds to stress by becoming permantely deformed WITHOUT breaking.
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Anticline
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Up curved folds in the layers.
LOOKS LIKE AN A . |
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Syncline
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Down Curved folds in the layers.
:))))))) |
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Monocline
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Are gently dipping bends in horizontal rock layers.
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Fracture
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Fracture is a break in the rock WITHOUT movement on either side of the rock.
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Fault
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Fault is a break in the rock when there IS movement on either side of the rock..... Resulting in MORE occuring earthquakes.
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Normal Fault
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Where the surface of a fault is at a steep angle or almost verticle.
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Hanging Wall
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Where rocks above a normal fault hang.
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Foot Wall
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Below the fault plane
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Thrust Fault
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The fault plane of a thrust fault is at a low angle or nearly horizontal.
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