In the depth of the earth, the temperature is very high. Rocky substances there collect in huge underground ‘fireplaces’, spreading out and rising up through cracks in the Earth, like natural chimneys, until they come out together through an openings in the Earth’s crust to form a volcano.
An eruption happens when the hot materials continue to burn, rising up the length of the ‘chimneys’ and exploding through the surface.
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Monday, February 8, 2010
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