Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← GeographyWhich outcome occurs when viscous magma continually erupts, forming an unstable lava dome?
A)Pyroclastic flow generation✓
B)Formation of a maar crater
C)Creation of a shield volcano
D)Development of a caldera lake
💡 Explanation
Pyroclastic flows are generated because pressure builds within the unstable lava dome, leading to its collapse via gravitational instability; ejecting hot gas and ash rather than forming a crater or volcano, which involve different eruption mechanisms.
🏆 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 speleothem formation rate declines inside deep cave systems?
- Which outcome arises from offshore winds encountering a coastline?
- Which atmospheric phenomenon results when the subtropical jet stream weakens poleward of Hadley cells during summer?
- Which process causes widened fractures when slightly acidic groundwater permeates limestone?
- Which outcome commonly occurs from increased silt weathering in loess deposits?
- Which seismic hazard is most directly associated with strike-slip movement along a transform fault?
