Which volcanic outcome often occurs because partial melting above subduction zones?

💡 Explanation

Island arcs form because flux melting lowers the mantle's melting point, generating magma that rises to create a chain of volcanoes parallel to the subduction zone. Partial melting causes localized, rather than widespread, volcanism; therefore island arcs arise instead of flood basalts.

• Which outcome increases when wind velocity increases near a source of loess?
• Which airflow pattern develops due to deflection from prevailing winds?
• Which geographic anomaly results because polar front intensification?
• Which outcome occurs when increased sediment loading over a subducting oceanic plate reaches a threshold?
• When a prolonged drought lowers the water table in karst regions with populated areas, which hazard's formation accelerates?
• Which outcome occurs when increased wave energy impacts fragile coastal cliffs?