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Only a few volcanoes on earth are formed like this, but their eruptions are the most violent and dangerous ones. Sometimes volcanoes also form in the middle of the plates which are called hotspots. These are places that are connected by cha...
http://www.buzzle.com/articles/how-are-volcanoes-formed...
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The forces that cause volcanoes are very powerful! These forces are not fully understood by scientists. Though scientists don’t fully understand these forces they have developed theories on how the forces create volcanoes. Deep inside the ...
http://library.thinkquest.org/TQ0312395/Volform.htm
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How is a volcano form? When a continental plate and an oceanic plate move toward each other and collide, the edge of the oceanic plate goes down into the part of the mantle which consists of molten rocks. At a depth of 125 to 160 km below ...
http://wiki.answers.com/Q/How_are_a_volcano_forms
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This interactive exhibit, part of the Exhibits Collection, explores why volcanic eruptions occur.
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www.learner.org/exhibits/volcanoes/
www.learner.org/exhibits/volcanoes/
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Volcanoes form when hot material from below rises and leaks into the crust. This hot material, called magma, comes either from a melt of subducted crustal material, and which is light and buoyant after melting, or it may come from deeper in...
http://answers.yahoo.com/question/index?qid=20090722100...
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Simply put, Volcanoes are formed because earth and all other planets are hot inside. Some scientists believe that volcanoes are a natural way to cool off for earth. Many feet under the crust on the earth, there is a semi-liquid hot rock flu...
http://www.blurtit.com/q498714.html
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Volcanoes are products of melting mantles, a journey through the Earth’s ... Since the layers of the Earth gets thinner and thinner, the immense mass of magma formed will travel up towards the Earth’s denser layers and will eventually reach the Earth’s surface and become lava. There are many different lava types.
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library.thinkquest.org/03oct/01893/webpages/how_volcano...
library.thinkquest.org/03oct/01893/webpages/how_volcanoes_form.htm
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they are not formed by folding and crumpling or by uplift and erosion. Instead, volcanoes are built by the accumulation of their own eruptive products -- lava, bombs (crusted over ash flows, and tephra (airborne ash and dust).
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pubs.usgs.gov/gip/volc/nature.html
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Depressions such as Crater Lake, formed by collapse of volcanoes, are known as calderas. They are usually large, steep-walled, basin-shaped depressions formed by the collapse of a large area over, and around, a volcanic vent or vents.
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pubs.usgs.gov/gip/volc/types.html
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