Which volcanic outcome arises when felsic magma stalls?

💡 Explanation

Violent pyroclastic density currents result from high viscosity felsic magma with dissolved gases; differentiation concentrates silica, increasing viscosity, and gas pressure. Therefore, stalled magma creates explosive eruptions and pyroclastic flows, rather than effusive basalt flow, because decompression triggers rapid gas exsolution.

• Which risk increases because of differential stress along faults?
• Which outcome results when surface winds drive ventifact formation?
• Which outcome results when the ocean's mixing layer weakens?
• Which outcome enhances global heat transfer due to ocean upwelling?
• Which atmospheric effect causes the Somali Current along East Africa to reverse direction seasonally?
• Which risk increases when a coastal engineering project disrupts sediment transportation?