Mount St. Helens in eruption. Aerial view of upper part of
Volcanoes are a window into the heart of the Earth's dynamic interior. Born of molten rock from deep within, volcanoes represent the ever recycling nature of the solid Earth. Awesome displays of fiery fountains of molten rock and massive eruptions of gases and ash impose a significant danger to human habitation in volcanically active regions. In this chapter we'll explore where volcanoes occur, how they are formed, and hazards they pose to humans.
By the end of this chapter you should be able to:
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