Mount St Helens Mount St. Helens is an active volcano in America. The part of America it is in is the Skamania County, Washington, in Northwest United States. It is 96 miles south of Seattle, Washington, and 50 miles northeast of Portland, Oregon. Mount St Helens is a stratovolcano. It last eruption in July 10, 2008. It is 2,550 m high. It was first ascended in 1853. It is in the Cascade Range. Its first ascender was Thomas J. Dryer. Mount St Helens was caused by the subduction of the Juan de Fuca
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Europe’s largest volcano. Over the last 2,500 years, it has erupted a lot. The Greeks believed that Mount Etna was one home of Hephaestus, the Greeks god of fire. “Beneath the volcano to forge where Hephaestus made beautiful metal object for the other greeks god.” Mount Etna is 11,000 feet high, it is the highest mountain in Italy south of the Alps. It is one of the most active volcanoes in the world. Most of Etna’s major eruptions have happened during the last 100 years. The volcano covers 460 square
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around a volcano, but tiny liquid droplets of sulphuric acid erupted into the stratosphere can change the planet's climate temporarily. Eruptions often force people living near volcanoes to abandon their land and homes. Those living farther away are likely to avoid complete destruction, but their cities and towns, crops, industrial plants, transportation systems, and electrical grids can still be damaged by tephra, ash, lahars, and flooding. Studies of the geologic history of a volcano are generally
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erupted out of a Mexican corn field in 1943. This volcano reportedly erupted for 9 whole years, covering adjacent towns with volcanic ash. Composite volcanoes are made by an accumulation of eruptions. The layers of these volcanoes are formed by hardened lava, tephra, pumice, and volcanic ash. Composite volcanoes are most commonly found in the Ring of Fire, a major area in the basin of the Pacific Ocean featuring 425 volcanoes. Mount Fuji, the tallest volcano in Japan, is
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`Volcanic and seismic events are major pieces of evidence towards proving that plate tectonics is valid' Discuss the extent to which you agree with this statement. The theory of plate tectonics states that the Earth's lithosphere is fragmented into a dozen or more large and small rigid sections called plates that are moving relative to one another as they float on top of the underlying semi-molten mantle. If we map out the divisions between these plates, it would correlate significantly with the
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Volcanic hazards vary from volcano to volcano due to there being many different types of volcano. In an acid dome volcano (destructive subduction boundaries) we see a viscous material with high amounts of silica. This causes rare but violent eruptions which is explosive. Other primary hazards will include pyroclastic flows and ash clouds. A basic shield volcano (constructive boundary) has a more runny lava with frequent eruptions. The hazards associated with a basic shield volcano include slow lava flows
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Volcanic Materials and Health Concerns Introduction: Basic Geology of Volcanoes A volcano can be a mountain like structure or a wide sloping hill that opens downwards to a pool of molten rock below the surface of the earth. When a break in the earth’s surface allows molten rock material to come up from the earth’s core, a volcano is formed. Volcanic eruptions can cause lateral blasts, lava flows, hot ash flows, mudslides, avalanches, falling ash and floods. These eruptions can also trigger tsunamis
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Tungurahua is a strato volcano located in Ecuador. This volcano is caused by subduction, as the Nazca pate slides below the South American plate. It is one of South America’s most active volcanoes, as of today. A strato volcano is a majestic volcano. It does not erupt often and when it erupts it has very high silica levels. Tungurhua has disproved the concept that strato volcanoes do not erupt often. Their lava flows are very thick and slow. Ever since the volcano started erupting more frequently
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can also be seen as an economic impact. In 2002 a huge column of ash was thrown up from the biggest eruption in recent years and was deposited as far away as Libya. Seismic activity associated with these eruptions caused the eastern flanks of the volcano to slip by 2m, causing structural damage to many houses. Lava flows completely destroyed the tourist station at piano Provenzana and part of the tourist station at Rifugio Sapienza. The airport at Catania was forced to close as the runways were covered
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Vic Camp Natural Disasters Study Guide — Extinctions, Impacts, and Volcano science What are tektites? * Natural glass rocks formed by impact of small meteorites on Earth’s surfaceWhat is Iridium? * Rare element in Earth’s crust, but high concentrations of some meteoritesWhat is shocked quartz? * Could only be produced with a strong impact on Earth; found commonly in relation to known meteorite impact sitesIn what way are tektites, Iridium, and shocked quartz related to the K/T extinction
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