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← GeographyWhich risk increases when a rhyolitic lava dome exhibits block faulting?
A)Magmatic volatile depressurization events✓
B)Increased formation of lahar flows
C)Higher rates of effusive eruption
D)Decreased hydrothermal vent convection
💡 Explanation
Magmatic volatile depressurization increases because block faulting fractures the dome, reducing pressure, leading to explosive eruptions; therefore, depressurization risk rises, rather than effusive flow or indirectly lahar generation or hydrothermal cooling alone.
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