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← GeographyWhich outcome occurs when a subducting oceanic plate hydrates?
A)Mantle wedge lowering melting point✓
B)Decreased sediment pore water pressure
C)Increased continental crust tensile strength
D)Transform fault system widening
💡 Explanation
Water lowers the mantle wedge's melting point during subduction due to flux melting. Because fluids are released, partial melting initiates, creating arc volcanism. That outcome happens, rather than changing crust strengths or pore pressure without flux melting.
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