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"
A volcano forms most often as part of the process of the hot magma trying to get to the surface of the Earth. This occurs at the edges of tectonic plates, where the earth moves, allowing
http://www.ask.com/web-answers/Science/Nature/how_...
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
http://www.ehow.com/info_8631618_amukta-volcano-fo...
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
http://wiki.answers.com/Q/How_is_a_volcano_formed
Volcanoes form when tectonic plates push against each other. This is also how mountains are formed. In a volcano, magma goes through openings in the crust and shoots out of the volcano
http://wiki.answers.com/Q/Why+and+how+are+volcanoe...
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. ...
Volcanoes form over cracks and fissures in the earth's surface. These cracks allow ash, molten rock and a mixture of gases to escape to the surface. Most volcanoes ...
Composite volcanoes are formed during eruptions that emit lava and volcanic rock that flow very slowly. Because of its viscosity this material cools near the volcano ...
About -  Privacy -  Careers -  Ask Blog -  Mobile -  Help -  Feedback  -  Sitemap  © 2014 Ask.com