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.
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
Q&A Related to "How Is a Volcano Formed"
Composite volcanoes are formed when layers of rocks and lava combine and dry up. Then the next layer of volcano lava appears and dries again. This process continues and causes the
http://answers.ask.com/Science/Nature/how_is_a_com...
A volcano is a large mound of earth and rock which is actually a passage or rupture through the earth's crust leading to liquid hot deposits of magma within the earth's mantle. It
http://www.ehow.com/how-does_4567109_a-volcano-for...
how can volcano be formed.
http://wiki.answers.com/Q/How_is_is_strata_volcano...
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,
http://wiki.answers.com/Q/How_does_magma_form_a_vo...
Explore this Topic
Volcanoes form when magma reaches the Earth's surface, causing eruptions of lava and ash. ...
Volcanoes form due to very hot Lava fluid in the core of Earth. It is boiling and has high energy. Whenever it gets any hole or thin surface it comes out. ...
Volcanoes are formed when hot Lava liquid comes out from hole or thin surface of Earth's crest. Lava has high energy and tries to get lower energy state. ...
About -  Privacy -  AskEraser  -  Careers -  Ask Blog -  Mobile -  Help -  Feedback © 2014 Ask.com