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is a mountain that forms when layers of lava and volcanic ash erupt and build up.

Rising magma eventually can lead to an eruption, where magma , solids, and gas are spewed out to form cone- shaped mountains called

As magma flows onto Earth ‘s surface through vent , or opening, it is called

Volcanoes have circular holes near their summits called

Active volcanoes sometimes spew

is a mixture of rock, mineral, and glass particles expelled from a volcano during a volcanic eruption

its particles are very hard and usually have jagged edges.