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← GeographyNear a stratovolcano, which outcome occurs with increased flux of volatiles throughout a pyroclastic flow?
A)Increased flow mobility and runout✓
B)Reduced plume height above vent
C)Elevated viscosity of ejected materials
D)Decreased likelihood of lahar formation
💡 Explanation
An increase volatile flux into a pyroclastic flow promotes fluidization, because this lowers friction between particles via increased gas pressure. Therefore, increased flow mobility results, rather than plume reduction because buoyancy rises with increased volatiles.
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