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Title: What caused the debris avalanche from Mount St. Helens in 1980? Post by: Fochaian on Apr 3, 2016 What caused the debris avalanche from Mount St. Helens in 1980?
A) volcanic eruption B) rainfall C) earthquake D) magma intrusion Title: Re: What caused the debris avalanche from Mount St. Helens in 1980? Post by: Gursh on May 15, 2016 Content hidden
Title: Re: What caused the debris avalanche from Mount St. Helens in 1980? Post by: Fochaian on May 18, 2016 This community is seriously awesome, thank you
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