The phrase that best describes the eruption of Mount St. Helens in 1980 is high-viscosity magma. This type of magma, which is rich in silica, results in explosive eruptions, such as the one that occurred at Mount St. Helens.
Mount St. Helens is a volcano that erupted with great force in 1980. Which phrase best describes this eruption?
quiet eruption
gentle lava flows
magma low in silica
high-viscosity magma
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