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by Tom Harris

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    Please copy/paste the following text to properly cite this HowStuffWorks article:

    Harris, Tom.  "How Volcanoes Work"  15 January 2001.  HowStuffWorks.com. <http://science.howstuffworks.com/nature/natural-disasters/volcano.htm>  28 May 2012.
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    Magma and Plate Tectonics
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    Volcano Formation
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    Magma Eruptions
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    Other Types of Eruptions
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    Volcano Shapes
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