Which outcome results when low silica magma is exposed to extremely high pressures?

💡 Explanation

An effusive eruption results because decompression melting reduces magma viscosity, therefore enabling the increased magma flow and broad lava formation, rather than viscous andesitic formation that would occur at higher silica content.

• Which characteristic determines the settling rate of alluvial sediments as river flow decreases?
• Which change directly causes alluvial fan deposition at a mountain range exit point?
• Which geologic consequence results when high discharge fluvial systems deposit sediment at mountain front?
• Which mechanism causes persistent volcanic island formation over a mantle plume?
• Which impact results when coastal upwelling weakens due to increased ocean stratification?
• Which process strongly influences nutrient distribution within an ocean gyre's convergence zone?