Which geological outcome occurs when oceanic plate subduction introduces water into the mantle wedge?

💡 Explanation

When a subducting oceanic plate introduces water into the mantle wedge, the water lowers the mantle’s melting point because hydration reduces bond strength, leading to increased magma production and arc volcanism. Therefore, increased melting/volcanism results, rather than strike-slip faults, density changes or rebound, all requiring different geodynamic processes.

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