Two broadcategories of faults exist - faults that exhibit horizontal movement and faultsthat exhibit vertical movement. Faults showing vertical movement includetensional (normal) and compressional (reverse) faults. Tensional faults areproduced through tension (extension or pulling apart) of the crust causing thehanging wall to move down relative to the footwall. A fault plane is arelatively flat surface where rocks break due to displacement. The hanging wallis the block of rock that sits above the fault plane; whereas, the footwall isthe block of rock that sits below the fault plane. Compressional faults areproduced through compression (shortening or pushing together) of the crustcausing the hanging wall to move up relative to the footwall. Note that in theanimation the rocks are layered. The older rocks are found at the bottom layersand become younger as you move up toward the surface. Examine a point alongthe fault plane.




You are watching: Which statement describes the movement of crust in a normal fault?

The block of rocks that lie above the fault plane is the footwall:
a. true b. false
Which statement best describes the movement along normal faults?
a. the hanging wall moves downward relative to the footwall b. the hanging wall moves upward relative to the footwall c. the hanging wall moves horizontally relative to the footwall d. faults are simple breaks in the crust along which no movement has occurred
a. the hanging wall moves downward relative to the footwall b. the hanging wall moves upward relative to the footwall c. the hanging wall moves horizontally relative to the footwall d. faults are simple breaks in the crust along which no movement has occurred
a. compressional forces b. extensional forces c. lateral movement of the crust d. both compressional and extensional forces
Examine a point along the fault plane. The rocks at a point above the fault plane of a normal fault would have:
a. younger rocks overlying older rocks b. older rocks overlying younger rocks c. rocks on both sides of the fault the same age d. both older and younger rocks overlying each other independent of the type of fault
a. younger rocks overlying older rocks b. older rocks overlying younger rocks c. rocks on both sides of the fault the same age d. both older and younger rocks overlying each other independent of the type of fault
a. horizontal motion b. vertical motion c. first vertical then horizontal motion d. first horizontal motion followed by vertical motion
If you straddle both a normal and reverse fault on the surface of the earth, the younger rocks are on the side that:
Both normal and reverse faults are associated with vertical movements of rocks. Vertical movement along a reverse fault is caused by which force(s)?
a. tensional forces b. compressional forces c. shearing or horizontal forces d. tensional and compressional forces
Normal faults are produced by tensional (extensional) forces.
a. true b. false
After movement along a fault plane, weathering and erosion occurs faster on:
a. upthrown block b. downthrown block c. the same on both the upthrown and downthrown block d. weathering and erosion does not occur
a. where two plates come together b. where two plates pull apart c. where two plates slide horizontally past each other
a. where two plates come together b. where two plates pull apart c. where two plates slide horizontally past each other


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