mount st. helens is a volcano that erupted with great force in 1980. which phrase best describes this…
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
Answer
Brief Explanations:
Mount St. Helens had a violent eruption in 1980. High - viscosity magma is associated with explosive eruptions as it traps gases, leading to high - pressure build - up and forceful eruptions. Quiet eruptions and gentle lava flows are not characteristic of its 1980 eruption. Magma low in silica is more likely to result in non - explosive eruptions.
Answer:
high - viscosity magma