Tuesday, August 9, 2011
What are the sequence of geological events that lead to a super volcano eruption? ?
Super volcanoes differ from normal volcanoes in many ways. The stereotypical volcano is a towering cone, but super volcanoes form in depressions in the ground called calderas. When a normal volcano erupts lava gradually builds up in the mountain before releasing it. In super volcanoes when magma nears the surface it does not reach it, instead it begins to fill mive underground reservoirs. The magma melts the nearby rock to form more extremely thick magma. The magma is so viscous that volcanic ges that normally trigger an eruption cannot p, so a mive amount of pressure begins to build up. This continues for hundreds of thousands of years until an eruption occurs, which blasts away a huge amount of ground, forming a new caldera.
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