Monday, April 15, 2013

Volcanoes: Power in Nature

SCIENCEMan evolves, grows and develops, and he grows his vanity and feeling powerful. Nature takes care to remind us of the fragility of our existence in a world whose age multiplied several times the existence of our species. Volcanoes are perhaps one of their most spectacular tools, destructive and creative life while architects of ancient terrestrial geography.
 A volcano (the mythological god Vulcan) is a conduit which connects directly the top of the solid crust with the lower levels of the same. It is also a geological structure which emerge by magma (molten rock) as lava and gases inside the planet. The rise usually occurs in episodes of violent activity called "flares", which may vary in intensity, duration and frequency; ducts being from lava flows to extremely destructive explosions.Acquiring a characteristic generally conical shape is formed by the pressure of underground magma well as the accumulation of material from previous eruptions. On top of the volcano can find its crater or caldera.Generally, volcanoes are formed at the boundaries of tectonic plates, although there are exceptions called hot spots or "hot spots" located in the interior of tectonic plates, such as the Hawaiian Islands. There are also volcanoes that could expel enough material to form volcanic islands.

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