what is reason behind the formation volcanoes?f'ollow me to get more points
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When rock from the mantle melts, moves to the surface through the crust, and releases pent-up gases, volcanoes erupt. Extremely high temperature and pressure cause the rock to melt and become liquid rock or magma. When a large body of magma has formed, it rises thorugh the denser rock layers toward Earth's surface.
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a volcano is formed when hot molten rock ash and gasses escape from an opening in the earth's surface .
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