Which mantle plume outcome increases near-surface volcanic eruption frequency?

💡 Explanation

Crustal thinning increases the volumetric flow rate of magma to the surface because decompression melting lowers magma viscosity. Therefore, the frequency of volcanic eruptions increases rather than decreases, which requires a larger magma chamber or slower lava flow.

• Which outcome occurs when longshore drift is interrupted by a groin?
• Which effect on crustal stress results from differential plate motion along a transform fault without complete slip?
• Which risk increases when saturated soil undergoes thaw cycles on a moderate slope in periglacial tundra?
• Which consequence results when excessive earthworm activity impacts agricultural topsoil?
• Which effect accelerates downslope movement via solifluction in high-latitude permafrost regions?
• Which outcome decreases wave energy transmitted landward across barrier islands?