VOLCANOES Most people have never seen a real volcano but have learned about them through movies or books. So when most people think of a volcano‚ they usually conjure up the Hollywood version: a huge‚ menacing conical mountain that explodes and spews out masses of lava which falls on rampaging dinosaurs‚ screaming cave people‚ or fleeing mobs of betogaed Romans - depending on their favorite volcano disaster movie. While those types of volcanoes do indeed exist‚ they represent only one "species"
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Volcanoes Joy Allen EVS1001 T 5:30 March 26th 2013 In this essay I will describe how volcanoes affect our environment. They both positively and negatively impact our world. I lived on the big island of Hawaii for a while‚ and got to experience firsthand the power of the volcanoes. I walked through lava tubes‚ dormant craters‚ and even watched red hot lava slither down the side of Kilauea and into the Pacific Ocean. They have fascinated me ever since. What is a volcano? “Volcanoes are awesome
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Introduction A volcano is an opening‚ or rupture‚ in a planet’s surface or crust‚ which allows hot magma‚ volcanic ash and gases to escape from the magma chamber below the surface. How is a volcano formed? Most volcanoes are formed by the movement of tectonic plates on the surface of the earth. These plates are basically huge pieces of rock that ‘float’ on the mantle (a layer of the earth that is sort-of liquid rock). The tectonic plates are in constant motion‚ albeit very slow motion. They sometimes
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Volcanoes are generally not preserved in the geologic rock record as they are usually eroded away. However‚ the various materials erupted from volcanoes are often found preserved in the rock record. From what you have learned about the different types of volcanoes‚ how could you infer what type of volcano erupted in a given area based on the type of volcanic deposits now found as layers of rock? Give specific examples‚ and briefly discuss how some materials may be linked to different types of volcanoes
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Hazards VOLCANOES INTRODUCTION Few things excite the imagination as much as a volcanic eruption‚ one of nature’s magnificent spectacles‚ which can result in devastating consequences. The very word “volcano” brings to mind thunderous explosions‚ rivers of fiery orange lava‚ and images of smoking destruction. The actual capacity for destruction is not overrated -- volcanic eruptions are one of the most devastating of all geologic hazards. There are about 700 potentially dangerous volcanoes in the
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Volcanoes are located in every single continent on planet earth. Mt Vesuvius is one of these large mountains. It is located near the city of Pompeii in Italy‚ and erupted on August 24th 79 AD. Volcanoes can be extremely unpredictable natural disasters‚ which cause tremendous amounts of damage to anyone unfortunate enough to live nearby. First of all‚ there are very many causes of volcanoes. Volcanoes are mountains that have hot scorching magma and lava boiling inside of it (Magloff‚ 2013). To begin
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lapilli‚ volcanic bombs and blocks)‚ and various gases are expelled from a volcanic vent or fissure. Several types of volcanic eruptions have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity‚ while others may display an entire sequence of types all in one eruptive series. There are three different metatypes of eruptions. The
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Geo assessment Mt Etna An eruption begins when pressure on a magma chamber forces magma up through the conduit and out the volcano’s vents. When the magma chamber has been completely filled‚ the pressure in the pipe will build up very high resulting in an explosion. When magma reaches earth’s surface it is called lava. It may pour out in gentle streams called lava flows or erupt violently into the air. Rocks ripped loose from the inside of the volcano or torn apart by the gas may be shot into the
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Underwater Volcanoes Submarine volcanoes or underwater volcanoes‚ come in all shapes and sizes and‚ are found across the world from Hawaii and California to Iceland‚ Japan‚ New Zealand and Antarctica. Worldwide‚ there are an estimated 5‚000 active submerged volcanoes‚ with the highest volcanoes in shallow water rising above sea level. Most submerged volcanoes‚ however‚ are located on ocean ridges. Volcanoes are dangerous‚ but when compared to land volcanoes‚ submarine volcanoes pose less
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Comparison of Mount St. Helens and Pinatubo Mount Pinatubo is situated in the southern part of Luzon. It is one of the biggest volcanoes in the Philippines whereas Mount St. Helens is located in the continent of North America. It is in the USA in the state of Washington‚ which in the far west of America. It is in the mountain range the Rockies. Pinatubo is a composite volcano and was dormant for 500 years until the June the 12th 1991 however St. Helens was dormant for 123 years and is
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