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 consequence results when pervasive weathering releases fine silicates?
• Which outcome occurs with increased land subsidence near a barrier island?
• On thawing arctic slopes, what landform results from widespread solifluction?
• Which process primarily drives the cyclical formation and enlargement of a cirque in an alpine environment?
• Which risk escalates on steep slopes in Arctic regions undergoing active solifluction?
• Which outcome is observed when subsurface clay layers impede water flow?