EARTH SCIENCE
STRUCTURAL GEOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The hanging blocks move upward relative to the footwall.
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The blocks in the fault both move downward.
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The fault causes a reaction that rises up and creates a mountain.
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Nothing happens with the blocks except that they move sideways a little.
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Detailed explanation-1: -In reverse faults, the hanging wall moves upwards relative to the footwall. This motion can be determined by tracing the offset of the beds in a vertical motion in a block diagram. In map view, the hanging wall rocks will be older than the footwall rocks, due to erosion of the uplifted side (Figure 15).
Detailed explanation-2: -A reverse fault is one in which the hanging wall moves up relative to the footwall. When rocks on either side of a nearly vertical fault plane move horizontally, the movement is called strike-slip.
Detailed explanation-3: -In a reverse fault, the block above the fault moves up relative to the block below the fault. This fault motion is caused by compressional forces and results in shortening. A reverse fault is called a thrust fault if the dip of the fault plane is small.
Detailed explanation-4: -reverse (thrust) fault-a dip-slip fault in which the upper block, above the fault plane, moves up and over the lower block.
Detailed explanation-5: -A reverse fault includes a hanging wall that rises above the footwall as a result of compression stress.