Definitions for volcanic eruptions

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U.S. National Library of Medicine

  1. Volcanic Eruptions

    The ash, dust, gases, and lava released by volcanic explosion. The gases are volatile matter composed principally of about 90% water vapor, and carbon dioxide, sulfur dioxide, hydrogen, carbon monoxide, and nitrogen. The ash or dust is pyroclastic ejecta and lava is molten extrusive material consisting mainly of magnesium silicate. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)

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"volcanic eruptions." Definitions.net. STANDS4 LLC, 2014. Web. 20 Dec. 2014. <http://www.definitions.net/definition/volcanic eruptions>.

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