What are advantages of volcanic eruption?
“The Earth’s crust, on which we live and depend, is in large part the product of millions of once-active volcanoes and tremendous volumes of magma that did not erupt but instead cooled below the Earth’s surface. Volcanic ash increases soil fertility for forests and agriculture by adding nutrients and acting as mulch. Groundwater heated by hot magma can be tapped for geo-thermal energy. This hot groundwater also has concentrated valuable minerals, including copper, tin, gold and silver, which are mined throughout the world.” http://www.mvo.ms/questions.htm “There is no exact definition for a super volcano, but the term is often used to refer to volcanos that have produced exceptionally large eruptions in the past. When one of these large eruptions occurs, a huge amount of material is blasted out of the super volcano, leaving a giant crater or caldera. Such a caldera can be as much as forty or fifty miles wide. …” An example
