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a concentration of heat in the mantle capable of producing magma, which rises to Earth's surface
a long tube that extends from Earth's crust us through the top of the volcano, connecting the magma chamber to Earth's surface
the mixture of hot gases, ash, cinders, and bombs that flow down the sides of a volcano when it erupts explosively
volcanic material that has built up around a vent into a steep, cone-shaped hill or small mountain
thin layers of lava pour out of a vent and harden on top of previous layers slowly building a wide, gently sloping mountain
formed when magma hardens in a volcano's pipe and the surrounding rock later wears away
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