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4 February, 22:55

What event triggered the main eruption of mount st. helens may 1980? multiple choice melting snow caused a huge steam eruption. magma encountered groundwater and exploded. a landslide removed rocks and released pressure on the magma. all of these?

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  1. 4 February, 23:52
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    The answer is C: A landslide removed rocks and released pressure on the magma. The landslide resulted from an earthquake that occurred on Sunday, May 18, 1980, which resulted in the entire weakened north side of the mountain sliding away. Subsequently, the released pressure allowed the explosion of partly molten rock from the volcano.
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