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← GeographyWhich outcome occurs when sediments compacting on an oceanic plate get dragged down during subduction?
A)Formation of an accretionary wedge✓
B)Increased mantle plume upwelling
C)Rift valley formation on overriding plate
D)Decreased volcanic arc activity
💡 Explanation
An accretionary wedge forms because the increased pressure and friction during subduction cause sediments to shear off the descending plate via a process known as offscraping; therefore, the wedge builds on the overriding plate, rather than causing volcanism.
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