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.

• Which seismic outcome characterizes regions near strike-slip faults experiencing tectonic creep?
• Which geological hazard accelerates along shorelines due to thawing permafrost beneath coastal bluffs?
• Which seismic effect results when a large earthquake occurs along a transform fault bordering a continental plate?
• Which outcome is amplified by the increased frequency of dust storms in playas?
• Which outcome occurs when permafrost thaw accelerates due to increased global temperatures?
• Which process increases sediment sorting across an alluvial fan system during periods of decreased discharge?