What is the volcano formed?Below the surface,the deeper the higher temperature.The ground at a distance of about 32 kilometers deep,the temperature high enough to melt most of the rock.Expansion of molten rock,when the need for more space.Some parts of the world,mountains in the uplift.These mountains are on the rise in pressure following smaller in size,these mountains may form a lava below (also called "magma") database.This material uplift along the rift caused by an increase.Curitiba,the pressure of the lava above it is greater than the pressure on top of the rock,it has become a volcano burst out.Eruption,the hot gas,liquid or solid material up suddenly.Accumulation of these substances in the openings around the formation of a conical hill."Crater" is a cone of depression at the top,opening to the surface pass.Cone-shaped mountains are the product of volcanic formation.Volcanic material is emitted gases,but as a large number of Java volcanic rocks and ash and solid material are also out spraying.In fact,the volcanic rock is lava from volcanic eruptions,when lava rose to the height of near-surface,its temperature and pressure started to decline,there were physical and chemical changes,becomes a volcanic magma.
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