Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← GeographyWhich outcome results when slow magma supply builds pressure inside a volcanic lava dome composed of andesite?
A)Sudden explosive pyroclastic density currents✓
B)Gradual increase in shield volcano size
C)Effusive quiet flow of basaltic lava
D)Steady emission of low-viscosity tephra
💡 Explanation
Sudden explosive pyroclastic density currents will occur because increasing internal pressure may exceed the dome's rock strength leading to catastrophic failure via the mechanism of gas expansion; therefore explosive eruption rather than effusive activity, or shield formation will happen.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Geography →- Which consequence results when high surface albedo interferes with Hadley cell formation?
- Which outcome results when rapid tectonic uplift interrupts fluvial deposition?
- Which outcome is driven by Sverdrup balance within ocean gyres?
- Which risk increases along strike-slip plate boundary regions?
- Which consequence results when thermal stratification impedes vertical mixing in fjord streams?
- Which process inhibits uniform frictional stress alongside transform plate boundaries?
