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Beneath The Surface Mauna Loa
1,512 wordsWhich are the biggest (tallest and largest volume) and smallest volcanoes on Earth? The island of Hawaii is probably the largest volcano on earth. From its base (on the floor of the Pacific Ocean) to the summit of Mauna Kea (about 13 000 ft) is some 30 000 ft i. e. higher than Everest. The island comprises several coalescing volcanoes including Mauna Loa, Mauna Kea and Kilauea. Mauna Loa alone has an estimated volume of 40 000 km 3. It is impossible to say which is the smallest volcano since the...
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Lava Flows Mount St
1,066 words... on of material into the air. Nonexplosive eruptions produce lava flows and eject very little pyroclastic material into the air. Explosive eruptions can eject liquid and semisolid lava as well as solid fragments of volcanic or nonvolcanic rock that have been carried along by the rising magma before eruption. Very violent explosive eruptions are called Plin ian eruptions, after Roman naturalist Pliny the Elder. These eruptions can last for several hours to days and eject a large amount of pyro...
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Volcanic Eruptions Directly Related
322 words2. There are three main factors that determine the nature of volcanic eruptions. Each factor has defined characteristics that can determine the effects of the volcano. The factors are the magmas composition, temperature and the amount of dissolved gases. Each of these affects the magmas viscosity, which is directly related to the nature of the eruption. The amount of silica content is directly related to the viscosity, as well. The composition of Mafic magma is about 50 % silica, which makes it ...
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Feet Above Sea Level Mauna Loa
580 wordsMauna Loa, which directly translated from Hawaiian means "Long Mountain", refers to a volcano located in the South Pacific. It is one of the largest volcanoes in the world and makes up a large portion of the island we know as Hawaii. Since its birth, somewhere between 700, 000 and 1, 000, 000 years ago, Mauna Loa has grown to over 13, 680 feet above sea level. To this day, Mauna Loa continues to be one of the most studied volcanoes in the world. Mauna Loa is an example of a shield volcano, resul...
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79 A D Eruption 79 A D Ash
442 wordsVesuvius is famous for the massive eruption in 79 A. D. that buried the towns of Herculaneum and Pompeii. Earthquakes frequently hit this area. The 79 A. D. eruption of Vesuvius was the first volcanic eruption ever to be described in detail. From 18 miles (30 km) of the volcano you could see the eruption. It is estimated that at times during the eruption the column of ash was 20 miles (32 km) tall. About 1 cubic mile (4 cubic kilometers) of ash was erupted in about 19 hours. Around 1: 00 pm on t...
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One Hundred Years Mauna Loa
1,337 wordsViewing an erupting volcano is a memorable experience; one that has inspired fear, superstition, worship, curiosity, and fascination throughout the history of mankind. The active Hawaiian volcanoes have received special attention worldwide because of their frequent spectacular eruptions, which can be viewed and studied with a relative ease and safety. The island of Hawaii is composed of five volcanoes, three of which have been active within the past two hundred years. Kilauea's latest eruption s...
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Lava Flows Hot Spot
448 wordsMt. Kilauea is one of the worlds most active volcanoes. The Hawaiian name Kilauea means spewing or much spreading. Located on the big island of Hawaii, it has had 61 major eruptions in its huge lifetime. Mt. Kilauea has an elevation of 4, 200 feet and has an area that consists of 552 square miles. Common questions asked about Kilauea are: What kinds of forces cause Mt. Kilauea erupt constantly over a long period of time, and why dont any other volcanoes do this? In response, the answers to these...
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Lava Flows Mount St
941 wordsThe plates which are about 20 miles thick, make up the earth's crust and are a chief cause of volcanic activity. These plates are always in motion. They move very slowly, however some at times bump in to each other. These movements put a lot of pressure on the surface rock. Volcanoes obtain their energies from such movement and pressure. Volcanoes form at the boundaries of these plate where two types of movement occurs, two plates will collide with each other or the plates will move apart from e...
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Shield Volcanoes Plate Tectonics
1,406 wordsWhen there is a sudden breaking of rocks within the earth or an explosion, wave like energy travels through the earth and is recorded on seismographs. These are called seismic waves and they are of two types: body waves and surface waves categorized into different kinds. What we will be discussing are body waves; there are two types of body waves: primary waves (P waves) and secondary waves (S waves). Both kinds travel through the Earths interior in all directions and arrive before the surface w...
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Mount St North Face
715 wordsMount St. Helen Eruption The eruption of Mount St. Helens occurred on May 18, 1980. It was the most significant eruption of the volcano in continental U. S. throughout the history. Today, most of geologists agree that the initial build up of magma, underneath the volcano, which resulted in eruption, was caused by the the movement of Earth's continental plates. The Mount St. Helens is located at the edge of Pacific plate, therefore the original seismic activity in volcano's vicinity, prior to eru...
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Oceanic Crust Shield Volcanoes
1,426 wordsVolcanoes Since the beginning of times, volcanoes were something that attracted human attention. Our ancestors often thought of volcanoes as places that powerful gods chose to make their home and they werent far from the truth. Volcano is a powerful exhibition of the might possessed by natural forces and the results of awakening such forces are often devastating. Today, volcanoes are a well-explored natural occurrence and theres even a science, called volcanology, which investigates this phenome...
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Environmental Protection Agency Ozone Depletion
1,137 wordsThe ozone layer diminishes more each year. As the area of polar ozone depletion (commonly called the ozone hole) gets larger, additional ultraviolet rays are allowed to pass through. These rays cause cancer, cataracts, and lowered immunity to diseases. 1 What causes the depletion of the ozone layer? In 1970, Crutzen first showed that nitrogen oxides produced by decaying nitrous oxide from soil-borne microbes react catalytically with ozone hastening its depletion. His findings started research on...
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Million Years Ago Millions Of Years
923 wordsReptiles Enjoyed Warm Arctic (Global Warming) An article written by ABC News writer Kenneth Chang discusses the change in climate of the arctic from ninety million years ago. Seven hundred miles from the North Pole, lies an island called Axel Heiberg, a barren land that scientists have dug up fossil bones of a cold-blooded reptile known as a champsosaur. How does this happen in an arctic, freezing land? How does a reptile that needs the warmth of the sun to survive, live in a frigid climate? Wel...
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Millions Of Dollars Lava Flows
1,235 wordsVolcano's occur all over the world. The best know volcano zones occur on the destructive plate margin around the Pacific Ring of Fire. This chain of volcano's that lie along the west coast of central and south America, Japan and the Philippines, across New Zealand and into the Atlantic. Volcano's also occur in mid-ocean along the line of ocean ridges. The Mid-Atlantic Ridge is an example of ocean floor volcano's. When these volcano's erupt lava flows from the cracks building up the ocean floor. ...
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Oceanic Crust Igneous Rocks
1,525 wordsI. INTRODUCTION A mountain is an elevated land mass usually higher than its surroundings. Some are isolated, but they usually appear in ranges (Ms Bs 95 W 32). A group of ranges closely related in form, origin, and alignment is a mountain system; an elongated group of systems is a chain; and a complex of ranges, systems, and chains continental in extent is a cordillera, zone, or belt. (Ms Bs 95 W 32). Some mountains are remains of plateaus, mesas, and buttes, through erosion (Summerfield). Other...
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Square Miles Miles North
1,106 wordsLateral Blast The sudden removal of the volcano's north flank released pressure on the hydrothermal and magmatic system within the volcano, triggering a devastating lateral blast to the north. The abrupt pressure release, or " uncorking, " of the volcano by the avalanche can be compared in some ways to the removal of the cap from a vigorously shaken bottle of soda pop, or to punching a hole in a boiler tank under high pressure. The northward-directed lateral blast of rock, ash, and hot...
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Mount St 000 Acres
213 wordsMount Saint Helens Mount Saint Helens, A volcanic peak in the Cascade Range, Mount St. Helens is situated in southwestern Washington State. Dormant since 1857, it erupted on May 18, 1980, in one of the most violent volcanic eruptions ever recorded in North America. An explosive steam eruption on March 27, 1980, was followed by alternating periods of inactivity and minor eruption. A severe earthquake on May 18 opened a crack along the mountains north side. The north slope fell away in an avalanch...
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Mount St 000 Feet
448 wordsMount St. Helens is a young volcano that developed over the last 40, 000 years within a very ruff terrain of meta volcanic rocks. Mount St. Helens was givens it s name some time between 1753 and 1839. This Volcano was named after Baron St. Helens. The mountain was named by Commander George Vancouver and the officers of H. M. S. Discovery. Mount St. Helens was known as the Fuji of America because its symmetrical appearance was similar to a famous Japanese volcano. The incredible cone top, whose s...
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Billions Of Years Volcanic Eruptions
367 wordsPlanet Earth is our home in space. It is a planet of continuous changes that started billions of years ago and that will continue for billions of years to come. Sometime the earth undergoes changes or movements that are rapid and effect our environment and safety. These rapid changes are known as natural disasters. These include earthquakes, volcanic eruptions, typhoons (hurricanes), tsunamis, floods, droughts, fires, and other events which are indications of interactions of mass and energy on t...
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Lava Flow Complex Dome And Lava Flow Complex Augustine
613 wordsSt. Augustine Volcano Augustine Volcano is the most frequently active and the youngest of the Cook Inlet volcanoes. Detterman considered Augustine to be entirely Quaternary and Johnston concluded that volcanism at Augustine began during the late Pleistocene Moosehorn glacial advance 19, 000 - 15, 500 IBP. Since its discovery by Captain James Cook in 1778, Augustine Volcano has had seven historical eruptions. 1883, 1935, 1979, 1985, 1986, and 1987. Yount and others, 1987. The activity in 1908, re...
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