benefits of a volcano
Volcanoes both harass and help mankind. As dramatically demonstrated by the Mount St. Helens on May 1980 Volcanic materials ultimately bread down to form some of the most fertile soils on Earth, cultivation of which fostered and sustained civilizations. People use volcanic substances as construction materials, as abrasive and cleaning agents, and as raw materials for many chemical and industrial uses. The internal heat associated with some young volcanic systems has been harnessed to produce geothermal energy.The Earth's crust, on which we live and depend on, 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 surface. For example, volcanic ash blown over thousands of square kilometres of land increases soil fertility for forests and agriculture by adding nutrients and acting as a mulch. Groundwater heated by large, still-hot magma bodies can be tapped for geothermal energy. And over many thousands of years, heated groundwater has concentrated valuable materials including copper, tin, gold, and silver, into deposits that are mined throughout the world. Therefore the benefits of living near the volcano outweigh the costs.
Some of the best rice-growing regions of Indonesia are in the shadow of active volcanoes. Helens mining district north of the volcano as early as 1892. Water as hot as 380 degrees C gushes out of geothermal springs along the spreading centers. Over thousands to millions of years, the physical breakdown and chemical weathering of volcanic rocks have formed some of the most fertile soils on Earth. -- The active volcanic vents along the spreading mid-ocean ridges create ideal environments for the circulation of fluids rich in minerals and for ore deposition. Deep-sea hot springs containing an abundance of dark-colored ore minerals of iron, copper, zinc, nickel, and other metals are called "black smokers. For 2 months the volcano was literally being wedged apart, creating a highly unstable and dangerous situation. The hot intruding magma provided the thermal energy to heat groundwater, which explosively flashed to generate and sustain the observed steam-blast eruptions. " On rare occasions, such deep-sea ore deposits are later exposed in remnants of ancient oceanic crust that have been scraped off and left ("beached") on top of continental crust during past subduction processes. during late March to mid-May 1980, Mount St. This is also the case of Mt Merapi in Indonesia where farmers are excited and continues to plant new rice on the rich soil. In addition to being an energy resource, some geothermal waters also contain sulfur, gold, silver, and mercury that can be recovered as a byproduct of energy production. Similarly, many prime agricultural regions in the western United States have fertile soils wholly or largely of volcanic origin.
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Acceptance Essays
