How Is a Volcano Formed?

Answer

A volcano is a vent through which molten rock known as magma rises from underground to the Earth's surface. Volcanoes are formed when magma from within the earth's upper mantle works its way to the surface. At the surface it erupts to form lava flow and ash deposits. Once lava or ash is pilled up around the vent, that is a young volcano but after many more eruptions it becomes a big volcano.
Q&A Related to "How Is a Volcano Formed"
One of 40 active volcanoes in Alaska, 3,497-foot-tall Mt. Amukta overlies an ancient shield volcano and dominates the tiny Aleutian Island of Amukta. The Aleutian Islands are a volcanic
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Volcanoes can be caused by mantle plumes. These so-called hotspots can occur far from plate boundaries. Hotspot volcanoes are also found elsewhere in the solar system, especially
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Under-neath the soil about 40ft to 86ft deep the hot pressure from. the center of the earth makes a hill in the ground that slowly grows. until it pops letting the gasses to escape,
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in the ocean.
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2 Additional Answers
Ask.com Answer for: how is a volcano formed
Volcanoes are created from a opening in the Earth's crust, which allows hot magma, ash and gases to escape. They form in the shape of cones, domes or simple fissures.
A volcano is formed when magma pushes up to the earth's surface. When the magma pushes up, the surface expands and grows. The more magma that pushes up, the bigger the formation can be. You can find more information here: http://www.windows.ucar.edu/tour/link=/earth/interior/volcano_formation.html
Explore this Topic
Volcanoes form when magma reaches the Earth's surface, causing eruptions of lava and ash. ...
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