What was the maximum distance travelled by erupted materials from the last major eruption of Mount St. Helens?
A) approximately 1200 km into Alberta and Montana
B) 18,000 m into the Stratosphere
C) around the world for several days
D) 400 m down the flank of the volcano

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The Answer of What was the maximum distance travelled by erupted materials from the last major eruption of Mount St. Helens?
A) approximately 1200 km into Alberta and Montana
B) 18,000 m into the Stratosphere
C) around the world for several days
D) 400 m down the flank of the volcano

What Was the Maximum Distance Travelled by Erupted Materials from the Last