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17 Cards in this Set
- Front
- Back
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Deformation
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Bending, tilting, and breaking of th earth's crust.
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Isostasy
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The balancing of these two forces
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Isostatic adjustments
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The up-and-down movements of the crust to reach isostasy
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Fracture
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When no movement is in the rocks along either side of a break
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Fault
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When rocks move
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Normal Fault
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One where the Fault plane is at a steep angle or almost vertical
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Fault plane
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Surface of a fault
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Hanging Wall
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Rocks above the normal fault plane
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Footwall
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Rocks below the normal fault plane
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Reverse Fault
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A steep or vertical fault; only occurs when compression causes the hanging wall
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Thrust Fault
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A special type of reverse fault; it's a low angle or horizontal
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Strike-slip fault
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Rock on either side of the fault plane slides horizontally
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Stress
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Force that causes pressure in the rocks of the crust
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Strain
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A change in the shape or volume of rocks that results frm th stress of beng squeezed, twisted, or pulled apart
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Compression
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Reduces the voume of rocks and pushes the rock higher up or deeper down into the crust
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Tension
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A force that puls rocks apart. When pulled they tend to become thinner
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Shearing
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Pushes rocks in the opposite horizontal directions
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