Which phenomenon causes stratovolcano formation at subduction zone plate boundaries?

💡 Explanation

When an oceanic plate subducts beneath a continental plate, seawater enters the mantle and causes flux melting because it lowers the melting point of mantle rocks, generating buoyant magma. Therefore seawater-induced flux melting leads to stratovolcanoes, rather than upwelling, differentiation, or extension, which occur in different geological settings.

• Which mechanism initiates thermohaline circulation when surface seawater freezes near polar regions?
• Which mechanism limits the maximum height of volcanic arc mountains formed by subduction?
• Which phenomenon causes increased shaking intensity when seismic waves encounter sedimentary basins?
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• Which mechanism causes downslope soil movement during solifluction in periglacial environments?
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