Which outcome occurs when high-silica magma explosively erupts?

💡 Explanation

Extremely viscous, high-silica magma traps gases, triggering violent eruption causing pyroclastic flow because volatile expansion shatters magma into ash. Therefore, scorching clouds of ash spread, rather than forming lava flows, trenches or undersea ridges.

• Which mineral resource accumulation concentrates within subtropical ocean gyres where Ekman transport converges debris?
• Following a subduction event, which risk increases because of crustal deformation?
• Which risk sharply increases when heavy tephra accumulates on glaciers?
• Which mechanism causes increased regional subsidence following megathrust earthquakes?
• Which seismic risk increases adjacent to dams intersecting transform faults?
• Which outcome is directly mitigated by building levees along alluvial plains?