Which crustal outcome occurs with mantle convection-driven subduction?

💡 Explanation

Volcanic island arcs appear near subduction zones because the descending plate melts and magma rises, causing volcanism. Crust is destroyed rather than created through seafloor spreading (mid-ocean ridges), rifting, or transform movement; therefore, island arc formation results.

• Which erosion dominates when seasonal wave energy intensifies at coastal headlands?
• Which volcanic activity is triggered when seawater lowers magma viscosity?
• Which atmospheric effect is intensified at mountain peaks exposed to strong prevailing winds?
• Which risk increases because excessive removal of vegetation occurs in permafrost regions?
• Which geological event reliably results when a locked strike-slip fault suddenly ruptures after substantial stress build-up?
• Which effect significantly alters global deep ocean current flow pathways in the North Atlantic?