EARTH SCIENCE
EARTHQUAKES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -A normal fault is one in which the rocks above the fault plane, or hanging wall, move down relative to the rocks below the fault plane, or footwall. A reverse fault is one in which the hanging wall moves up relative to the footwall.
Detailed explanation-2: -In normal faults, the hanging wall moves downward relative to the footwall (Figure 13 and Figure 14). This motion can be determined by tracing the offset of the beds in a vertical motion in a block diagram.
Detailed explanation-3: -Normal, or Dip-slip, faults are inclined fractures where the blocks have mostly shifted vertically. If the rock mass above an inclined fault moves down, the fault is termed normal, whereas if the rock above the fault moves up, the fault is termed a Reverse fault.
Detailed explanation-4: -Normal Faults: This is the most common type of fault. It forms when rock above an inclined fracture plane moves downward, sliding along the rock on the other side of the fracture. Normal faults are often found along divergent plate boundaries, such as under the ocean where new crust is forming.
Detailed explanation-5: -Tensional faults are produced through tension (extension or pulling apart) of the crust causing the hanging wall to move down relative to the footwall.