infrastructure are known as natural hazards. Volcanic eruptions can swiftly become natural hazards which can quickly lead to major loss of life and widespread damage. Primary hazards that are associated with volcanoes include; pyroclastic flows‚ Tephra‚ Lava flows and volcanic gases. Pyroclastic flows are waves of very hot gases and tephra with flow with high velocities. The pyroclastic flow that was seen at the eruption of Mount St Helens‚ USA in 1980 was a result of dense gas and ash combinations. It
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surface. Extrusive: Igneous rock that forms at the Earth Surface. Felsic: Igneous rock rich in potassium feldspar and quartz and light color. Mafic: Igneous rocks that are rich in dark Plagioclase feldspar‚ pyroxene and that are dark in their color. Lava: Magma that reaches Earth surface. Texture: The feel of a rock due to its size‚ shape and its arrangement of mineral crystal or sediment in a rock. Porphyry: Igneous rock containing coarse crystals in a finer grained groundmass
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one reaching the surface. During volcanic eruption‚ most of the lava ejects through the main vent. The third main part I will tell you about is the secondary vent and cone. The larger volcanoes can have more than one vent for the magma to reach the Earth’s surface. Secondary vents‚ with the main vent‚ are a way for the magma to move and reach the surface during volcanic eruption causing unforeseen dangerous situations when the lava flow suddenly widens or starts to flow to a different direction
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magma to rise and come out together with gas‚ rocks and ashes. Violence of an eruption depends on how much pressure the volcano is under before it erupts. (How do volcano erupt) “In a volcanic eruption‚ hot lava spews out from beneath the Earth’s crust up to the Earth’s surface.” The hot lava spewed out is actually magma‚ hot melted rock. (Why do volcanoes erupt) “Sometimes the magma chamber breaks its sides and only reaches to the flank or summit of volcano and sometimes reaches to the surface causing
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A hazard is a situation that poses a level of threat to life‚ health‚ property‚ or environment. There is a very big difference that helps prepare for a volcanic hazard and that is whether you are in a MEDC or a LEDC. In a MEDC monitoring volcanic zones and potential hazards is an option many LEDC’s don’t have. In Italy at Mt Etna they have Geochemical monitoring programs currently run by INGV which focus on the analysis of temporal changes‚ chemical changes and seismic activity. This option open
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Pressure- results from a force pushing on an area Crust-contains land and ocean floor (50-70 km); solid Mantle-2867 km; solid Lithosphere-crust and uppermost part of the mantle; solid Asthenosphere-soft layer within the mantle Outer core-2‚266 km; liquid Inner core-1‚216 km; solid Pangaea-“super continent”‚ when all continents were connected Subduction-when one continental plate slides under another‚ at a deep-ocean trench Deep-ocean trench-a place in the ocean where subduction occurs Mid-ocean
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out.” (Carson 63) Silica is actually a compound white in color. Geryon’s emphasis on the lack of silica lets us interpret that he has very little life left after being rejected. In the autobiography‚ Geryon is particularly interested in the story of Lava Man‚ who defies death by surviving a volcanic eruption. He is described by Herakles grandmother: “I am a drop of gold he would say I am molten matter returned from the core of earth to tell you interior things- Look! He would prick his thumb and press
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cinder and complex (compound) volcanoes. One type of volcano is‚ Etna this volcano is also entitled a “strato volcano” it produces violent activity including lots of ash‚ lava and gas which causes danger to the population around any slopes nearby. Etna’s type of magma is high in silica when it occurs it’s accompanied by other large lava flows. 5. Deaths: Mayon (2006) Injuries: merapi (2010) Damage: merapi (2010) highest of 4 (extreme) 6. Yes‚ I did find a relation between these volcano effects
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CINDER CONE VOLCANO The cinder cone volcano‚ commonly found in volcanic areas‚ are constructed of rocks and ashes. Gas created from the lava is blown into the air which then “cools and solidifies as small rocks or cinders”. Cinder cone eruptions “take place in basaltic volcanic fields” that immensely effect the human population surrounded by it. Cinder cone eruptions majorly impact the environment by distributing volcanic gases‚ volcanic landslides and blasting tephra. One of the long-term impacts
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is a low and flat shield volcano that rises only 1‚247 meters above sea level. Till date‚ the Kilauea volcano is the most active and the most visited volcano in the world” (Oak‚ By Manali). Mount Kilauea is the youngest volcano in Hawaii. It has a lava level of 740 ft. under the rim. “Kilauea was formed under a hot spot under the crust. So were the other volcanoes on the Big Island such as Kohala‚ Mauna Kea‚ Mauna Loa‚ and Hualalai. There have been 34 eruptions since 1952 and 61 eruptions total”
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