Which consequence results when highly silicic magma erupts effusively?

💡 Explanation

Lava domes form because high-silica magma has very high viscosity from increased polymerization; therefore, lava accumulates near the vent instead of flowing freely downhill, rather than producing broad flows because lower-silica magmas have markedly lower viscosity.

• Which outcome frequently occurs at subduction zones because of rapid plate convergence exceeding material strength?
• Which deformation results when magma viscosity increases within a volcanic lava dome?
• Which volcanic outcome arises when felsic magma stalls?
• Which geomorphic feature develops when melting permafrost destabilizes slopes in arctic tundra?
• Which feedback results when sustained aeolian abrasion forms ventifacts?
• Which mechanism accelerates stream erosion as a result of increased glacial meltwater discharge?