The volcano is a landform that magma eruption through up to the surface of the planet. The volcano occurred near the joints between the plates. However, there are exceptions, called the hot spot is a volcano volcano. (Volcanic Hotspot).Called volcanology (vulcanology or Volcanology)
.Volcanic eruption
.The mountain was changed the nature of the earth's crust. The tectonic plates continents push the folding (Fold) shape of the hood upside down and hood facing alternately. The mountain top is flat may be caused by the uplift of the crust along the fault (Fault).(Volcano) is different from the general mountain origins The volcano is caused by the uplift of the magma beneath the crust
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image 1 Structure of volcanic magma
.When the tectonic plates move toward ocean. Or clash with tectonic plates continents. Tectonic plates which have ocean density than to sink into the floor, Bacchus And the fused into magma or magma (Magma).:
.Heat:When the tectonic plates collide, and sink to the floor, Bacchus Friction, which is caused by the tectonic plates will cause both friction heat. Rush to the skin layer of the oceanic lithosphere sinking. Melt into magma easier
.The water in the asthenosphere:Wet rocks (Wet rock) have lower melting point dry stone (Dry rock) when rock in crust sank into the ocean floor plate asthenosphere. Water molecules, which changed the status of the steam will accelerate the reaction to the birth stone fusion easier
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