The eruption that occurred on Mount St. Helens was triggered by a

A. huge landslide that caused a lateral blast that knocked down trees and buildings.
B. cinder cone that sent up a large column of pyroclastic material.
C. volcano that was so heavy that it caused part of the island to collapse.
D. fast-moving viscous lava flow that flowed through the middle of Portland.
E. None of these choices are correct.


Answer: A

Environmental & Atmospheric Sciences

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What will be an ideal response?

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