Which outcome results when magma composition shifts within a subduction zone volcano?

💡 Explanation

Increased explosive eruption frequency occurs because volatile content concentrates during magmatic differentiation increasing pressure, and therefore explosive eruptions are more likely, rather than effusive flows under different degassing conditions.

• Which effect increases when mountain ranges exceed the environmental lapse rate?
• Which outcome results from stress build-up along lithospheric transform plate boundaries?
• Which outcome results when extensive wind-driven deflation occurs in semi-arid climates?
• Which risk increases when a megathrust earthquake occurs along a subduction zone lacking strain partitioning?
• Which process drives cirque formation when glacial ice accumulation fluctuates?
• Which outcome occurs when earthworm populations facilitate bioturbation in topsoil?