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← GeographyWhich risk increases when a rhyolitic lava dome rapidly degasses?
A)Plinian eruption column collapse✓
B)Formation of pillow basalts
C)Enhanced shield volcano growth
D)Increased geothermal energy production
💡 Explanation
Rapid degassing causes increased pressure and potential unloading, triggering explosive fragmentation via vesiculation. The resulting pyroclastic flow is due to column collapse because the fragmented dome material is too dense, rather than forming effusive lava flows or geothermal resources.
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