Geo tectonics
2007-11-27 04:33:19
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answer #1
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answered by Anonymous
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Most volcanoes are formed over subduction zones. This is where 2 plates collide and 1 plate over-rides the other. As the subducted plate moves towards the core, the carbon dioxide within the rocks starts to dissolve releasing gases. Molten rock is forced upwards, (also because of buoyancy), through the crust, forming the familiar cone shape that you associate with volcanoes over a period of time.
2007-11-27 12:44:36
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answer #2
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answered by robincaz 2
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The vast majority of volcanoes are caused by techtonic plates moving in reference to each other. If you are looking for a specific material I would go with Magma. As far as the periodic table of elements....that would not really apply.
2007-11-27 12:43:20
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answer #3
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answered by meestaben 3
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The most important element is HEAT! It doesn't matter what other elements you have, If you have enough heat you have a volcano. You can find all kinds of elements in lava.
2007-11-27 17:59:09
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answer #4
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answered by Jackolantern 7
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there is no particular element which causes volcanoes just a thin spot or crack in the earths crust to allow magma to rise to the surface is what causes volcanoes to form.
2007-11-27 12:23:56
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answer #5
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answered by Loren S 7
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I don't think this question refers to periodic elements. I think it means physical attributes. I could be wrong, but that's what I think when I read this question.
2007-11-27 12:20:45
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answer #6
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answered by Lady Geologist 7
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A destructive plate boundary.
2007-11-27 12:31:35
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answer #7
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answered by Your little helper 4
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