What is volcano ?

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Gaurav Seth 6 years, 10 months ago
Nov 1, 2016 - A volcano is an opening in Earth's crust that allows molten rock from beneath the crust to reach the surface. This molten rock is called magma when it is beneath the surface and lava when it erupts or flows from a volcano. Along with lava, volcanoes also release gases, ash, and rock.
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