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Volcano is an opening in Earth's surface through which lava, boiling gases, and stone fragments erupt. Also known as an opening, which forms when melted rock from deep within Earth blasts through the surface. Volcanoes are very enormous in width as well as length. Most volcanoes are mountains, which were built up around the opening by lava and other materials thrown out during eruptions. Without a doubt volcanoes provide necessary services to nature in the …

…result of their eruptions. The parts of the volcano are the magma chamber, where the magma is stored, then the vent, which is from where the magma rises. There can be many smaller vents in addition to the main vent in the volcano. Then comes the crater, which is the vent's alleyway to the outside world. Volcanoes have positive and negative effects of there eruptions, and are the causes in a sufficient number of tragedies.