A geyser is a hot spring that regularly shoots water and steam into the air. Geysers fo only wh hot ro lies cl to t surface o the gro. Water fr rain a melting sn seeps down through cracks and collects in narrow underground channels. There, the heat from the rock raises the temperature of the water far above its normal boiling point. Eventually, the pressure becomes so great that the water bursts out through an opening at the surface. Then the channels slowly refill, and the cycle begins again.

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