Volcanoes

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Volcanoes

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A volcano is a vent that is in the Earth's crust that blows out steam,lava,and ash. There are three types of volcanoes shield,cinder cone,and composite volcanoes.Most volcanoes are on the Ring Of Fire.Volcanoes erupt when a tectonic plate pushes up the magma forming a mountain because of pressure. There are more than five hundred active volcanoes in the world and over 80% of the Earth's surface is volcanic in origin. From all the types of volcanoes.