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Why is the silica content of magma significant for volcanic eruptions?

April 26, 2017content Eruptions magma SIGNIFICANT silica Volcanic

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Why is the silica content of magma significant for volcanic eruptions?

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So magma with low silica content is runny, and wiht just flow gently out of a volcano, like in hawai, but viscous (sticky, like honey) magma will not, and gas gets trapped within it, and then explodes out, cause large scale explosive erruptions.