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12 Cards in this Set
- Front
- Back
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Faults
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a break in the earth's crust along which movement has occurred.
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Anticline
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an upward fold in a rock
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Fracture
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A break in a rock
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Syncline
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A downward fold in a rock
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Dip-Slip Faults
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Movement along dip-slip faults is vertical; one side moves up and the other side moves down
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Hanging Wall
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The rock surface that is immediately above the fault.
Miners and prospectors would hang their lanterns on the hanging wall. |
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Footwall
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The rock surface below the hanging wall.
Miners and prospectors would walk on the rocks below the mineralized fault zone, known as the footwall. |
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Normal dip-slip faults
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When the hanging wall block moves down and the footwall moves up. Most normal faults have steep dips of about 60º.
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Reverse faults
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The hanging wall block moves up and over the footwall. Reverse faults have dips greater than 45º.
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Thrust Faults
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The hanging wall block moves up and the over the footwall. Thrust faults have dips less than 45º.
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Strike-slip fault
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A fault along which the movement is horizontal. Because of their large size and linear nature, they can be visible over a great distance.
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Transform fault
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A special kind of strike-slip fault that cut through the lithosphere and allow motion between two large crustal plates.
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