Why Volcanoes Erupt Explosively in Some Places But Gently in Others
为什么火山在某些地方剧烈喷发,而在另一些地方却温和涌出?
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Volcanic explosiveness depends mostly on how much silica and dissolved gases magma contains before rising.
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High-silica magma, like rhyolite, is thick and sticky, trapping bubbles of steam and carbon dioxide.
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