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"
Under the surface of the Earth, the materials are very hot. When that hot magma, as it is called, rises to the top, it often erupts on the surface and this is what causes a volcano.
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There are 5 steps(reasons) on how a volcano is formed. They are the following: -Fissure -Magma realleased -Lava will accumulate the surrounding area -Lava cools,then turns into a
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Rift volcanoes form when magma rises into the gap between diverging plates. They. thus occur at or near actual plate boundaries.
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Volcanoes can have massive effects on the environment. When they erupt, they spew large amounts of dust, ash and gasses into the air, possibly causing a temperature change around
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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
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Volcanoes form when magma reaches the Earth's surface, causing eruptions of lava and ash. ...
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Volcanoes form by pressure that builds up underneath the Earth's surface. The part in the inside of the Earth where this activity happens is called the mantle. ...
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