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← GeographyWhich risk escalates when a lava dome's exterior cools?
A)Increased pore pressure beneath dome✓
B)Accelerated effusive eruption rate
C)Reduced volatile gas dissolution
D)Suppressed magma convection currents
💡 Explanation
Elevated pore pressure increases because the 'plugging' action from dome cooling restricts gas escape via permeation; therefore, more pressure accumulation leading to explosion rather than slow release, rather than effusive rates.
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