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← GeographyWhich mechanism primarily causes uplift in fault-block mountain ranges resulting from normal faulting?
A)Buoyant forces from isostatic rebound✓
B)Folding due to compressional forces
C)Erosion exposing resistant rock layers
D)Extension leading to crustal thinning
💡 Explanation
When a normal fault occurs, one block slides downward relative to the other, causing isostatic rebound because the removal of overlying material reduces lithospheric loading, initiating buoyant uplift. Therefore buoyant isostatic forces causes uplift, rather than compressional folding, differential erosion, or simple crustal thinning alone.
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