EARTH SCIENCE
STRUCTURAL GEOLOGY
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Fault blocks move past each other horizontally.
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Fault blocks move past each other vertically.
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The faults do not move at all.
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The faults do move but not enough to cause anything.
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Detailed explanation-1: -Faults which move horizontally are known as strike-slip faults and are classified as either right-lateral or left-lateral. Faults which show both dip-slip and strike-slip motion are known as oblique-slip faults.
Detailed explanation-2: -Strike-slip faults are vertical (or nearly vertical) fractures where the blocks have mostly moved horizontally. If the block opposite an observer looking across the fault moves to the right, the slip style is termed right-lateral; if the block moves to the left, the motion is termed left-lateral.
Detailed explanation-3: -10.6c: Shearing forces cause rocks to slide horizontally past one another such as along transform plate boundaries to produce extensive fault systems.
Detailed explanation-4: -After a quake along a strike-slip fault, railroad tracks and fences can show bends and shifts. And, of course, the motion can cause bridges and buildings to collapse. With both normal and reverse faults, movement occurs vertically.
Detailed explanation-5: -Strike slip systems are relatively narrow and subvertical wrench zones along which two adjacent blocks move sideways, horizontally, parallel to the strike of the fault zone. For example, they are produced at transform plate boundaries where plates horizontally slide past one another.