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Why is silica-rich magma explosive?

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Why is silica-rich magma explosive?

asked Aug 8, 2017 155k views

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Why is silica-rich magma explosive?

Biology
middle-school

Charalamm asked

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1 Answer

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Because a high silica content makes the lava more viscous, so more pressure is able to build up in it.

JohnGalt answered Aug 14, 2017

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