Which geological feature primarily results from mantle upwelling during oceanic plate subduction?

💡 Explanation

When an oceanic plate subducts, the release of water from the slab into the mantle wedge causes partial melting and mantle upwelling, leading to volcanism and the formation of a back-arc basin. Therefore a back-arc basin forms rather than transform faults, rift valleys, or trench deepening which involve different tectonic regimes.

• Which ecological outcome occurs when coastal upwelling currents are significantly reduced?
• Which weather outcome intensifies because of high-altitude Coriolis forces?
• Which outcome occurs when trade winds weaken along the equator in the eastern Pacific Ocean, reducing upwelling?
• Which process causes the formation of a volcanic arc when oceanic lithosphere subducts beneath continental lithosphere?
• Which topographic effect does accelerated solifluction primarily generate on moderate slopes?
• What ocean dynamics create stronger ocean upwelling along the western coasts of continents around the globe?