11. Observe the following category of faults and write a short description of each displacement orientation;
A. Dip-Slip Fault:_________________
B. Stirke Slip Fault;________________
C. Oblique slip fault:________________
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Answers & Comments
Answer:
A. 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 reverse. A thrust fault is a reverse fault with a dip of 45 degrees or less.
B. 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.
C. Oblique-slip faults
A fault that has a component of dip-slip and a component of strike-slip movement is termed an oblique-slip fault. ... The event involved both reverse and dextral strike-slip fault movement, which lifted the Rimutaka Ranges by more than 6 m and displaced the ground horizontally by more than 18 m.
Explanation:
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