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which statement about the 1980 eruption of mount st. helens is false? group of answer choices the most powerful explosive event was preceded by a massive landslide mudflows accompanied the major eruptive events the eruption was dominated by basaltic lava flows plumes of ash rose high into the atmosphere during the major eruptive events



Answer :

The statement about the 1980 eruption of Mount St. Helens, option c, the eruption was dominated by basaltic lava flows is false.

Mount St. Helens is an active volcano in Skamania County in Washington. It is a stratovolcano or a composite volcano built by layers of lava. It is also a part of the Cascade Volcanic Arc in Western North America which is an extended segment of the Pacific Ring of Fire.

Mount St. Helens erupted in 1980 which remains one of the worst natural disasters destroying human life and the economy. It killed as many as fifty-seven people were killed and two hundred homes were destroyed in the eruption. It destroyed 24km of railways, forty-seven bridges, and 298km of highway. It was a lateral eruption caused by an earthquake of 5.1 magnitudes.

Mount St. Helena erupted dacite lava with 64% silica and 4% water in it. Therefore, option c is false.

Learn more about Mount St. Helena here https://brainly.com/question/13620918

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