Which mechanism causes the formation of explosive stratovolcanoes at subduction zones?

💡 Explanation

When a denser oceanic plate subducts, flux melting occurs because the subducting plate releases water and other volatiles into the overlying mantle wedge, lowering its melting point and creating more viscous, gas-rich magma. Therefore explosive volcanism results, rather than mafic magma, plumes or fissures which are from different scenarios.

• Which ecosystem change results when cave passages collapse, forming dolines?
• Which process destabilizes hillsides when permafrost thaws due to warming temperatures?
• Which risk is amplified when increased stream power transports excessive alluvial sediment load across a subsiding floodplain?
• Which phenomenon significantly reduces primary productivity when El Niño disrupts equatorial ocean circulation?
• Which mechanism causes the formation of an escarpment along a normal fault line?
• Which geologic consequence results when high discharge fluvial systems deposit sediment at mountain front?