Volcanoes of the world Encyclopedia : The content of this encyclopedia shows how the Volcanoes are the ultimate expression of the activity earth. inner Earth has more than 800 active volcanoes. Most of them can not see them because their assets eruptions occur in the deep sea volcano is a geological formation consisting of a crack in the earth's crust on which it will collect cone of volcanic material. At the top of the cone is a concave opening, called crater. This cone is formed by deposition of a mixture of matter solid and melt (lava).
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The topics covered by this fabulous Encyclopedia are: Types, volcanic eruptions, components.
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