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Volcanoes

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Volcanoes

AFP English

14 Views • Jul 10, 2015

Wikipedia Context

A volcano is a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.

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Description

Constantly moving on a hot bed of magma, volcanoes form in two ways at their boundaries. Plates sometimes collide, causing one to slide beneath the other. This is called a destructive boundary. Pressure and heat created by this movement forces magma up into cracks in the rocks until it explodes to the surface, as lava, causing a volcanic eruption. VIDEOGRAPHIC

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#MOTION #VOLCANO #VGRX #Volcanoes #GRAPHICS

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