The cup-shaped or funnel-shaped opening at the top of a volcano is called a crater. It is the vent through which magma, ash and gases are ejected during an eruption. Craters are formed by the explosive removal of the volcano’s ...
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The cup-shaped or funnel-shaped opening at the top of a volcano is called a crater. It is the vent through which magma, ash and gases are ejected during an eruption. Craters are formed by the explosive removal of the volcano’s ...