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← GeographyWhich outcome consistently results when effusion rate slows in a volcano forming a viscous dome at 3500m?
A)Increase in dome instability potential✓
B)Enhanced convection within the vent
C)Formation of low-angle lava flows
D)Widespread alkaline ash deposition
💡 Explanation
Dome volume dictates instability; a slower effusion increases the steepness therefore the gravitational stresses increase the likelihood of flank collapse, pyroclastic flows and explosive events rather than convection or other forms of gentle extrusion.
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