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← GeographyWhich volcanic outcome increases when dissolved gases exceed solubility?
A)Explosive eruption column formation✓
B)Formation of pahoehoe lava flows
C)Creation of shield volcano calderas
D)Generation of hydrothermal vent systems
💡 Explanation
Explosive eruptions occur from high gas concentrations because bubble nucleation creates rapidly expanding bubbles; this is known as “vesiculation”. Therefore, explosive eruptions form rather than effusive flows because escaping gas accelerates magma, instead of slowly oozing out.
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