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Geography

Which 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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