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What Is a Geyser?

What Is a Geyser?

Ever see a picture of Old Faithful in Yellowstone National Park? While rare, geysers are amazing sights for those fortunate enough to witness them.

Find out the conditions needed for boiling water and steam to escape through a narrow hole in Earth's crust. Then view a map of the world's geysers and see what makes them some of the most fantastic geologic events on Earth (and beyond!).

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