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← GeographyWhich risk increases because internal pressure is confined when magma domes block volcanic vents following an eruption?
A)Increased frequency of Plinian eruptions
B)Decreased frequency of Strombolian eruptions
C)Increased probability of lateral blasts✓
D)Decreased amounts of pyroclastic material
💡 Explanation
A magma dome blocking a vent leads to increased pressures because, without release, volatile build-up increases the chance of destructive lateral blasts, rather than a Plinian eruption that requires direct vent access.
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