The eruption that occurred on Mount St. Helens was

Chapter , Problem 67MCQ

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Problem 67MCQ

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

A. A huge landslide caused a lateral blast that knocked down trees and buildings.

B. A fast-moving viscous lava flow flowed through the middle of Portland.

C. A volcano that was so heavy that it caused part of the island to collapse.

D. A scoria cone that sent up a large column of pyroclastic material.

E. None of these.