Description:
In a clear, concise text with over twenty-five stunning full-color photographs, the noted science writer Seymour Simon explains how the four major types of volcanoes are formed, why they emerge only in certain places, and what to look for in the two kinds of lava. He also reveals astonishing facts about volcanoes: For example, some rivers of lava can travel at speeds of up to thirty-five miles per hour!
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