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Mount Saint Helens

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by

Tori Nelson

on 29 January 2013

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Transcript of Mount Saint Helens

Mount St. Helens Mount St. Helens is located in Washington. Mount St. Helens Vancouver Washington is the closest major city to Mount St. Helen's.Vancouver has a population of 164,759 and is about 60 miles away from Mont St. Helen's. Mount St. Helens is in the Cascade range. Mount St. Helen's crater is about 5,000 feet deep and about 2.5 miles wide. Facts Mount St. Helens is a composite volcano/lava dome volcano. Mout St. Helen's is not located in the ring of fire, it is located in a subduction zone. Mount St. Helen's region is a hot spot. Facts Now, a group of researchers say they've found evidence that some of the explosive peaks are connected creating a massive body of partially-molten rock that stretches between Mount St. Helen's, Mount Adams and Mount Rainier.If they're right, the magma chamber would be one of the biggest ever discovered. Mount St. Helens was formed along a subduction zone not a rift zone. After the 2004 eruption of Mt. St.Helens 25 people were confirmed dead after 3 weeks of investigating, but 47 were still on the missing list. Luckily, 15 of the missing were later found alive. 57 people did after the eruption of Mt. St. Helens during 1980 to many were injured to be counted. Fun Facts Electronic tiltmeters detected the rising and tilting of the ground before Mount St. Helen's erupted in 1980. Mount St. Hele's has 2 vents. Definitions Definitions Magma Chamber- A reservoir of magma in the earths crust where the may reside temporarily on its way from the upper mantle to the earths surface. Vent- An opening at the earths surface from which volcanic material as lava, steam, or gas is emitted. Crater-The cup-shaped depression or cavity on the surface of the earth or other heavenly body marking the orifice of a volcano. Ash-Finely pulverized lava thrown out by a volcano in eruption. Pumice- A porous or spongy form of volcanic glass. Floods and mudslides were other events associated with Mount St. Helens erupting in 1980. Mount St. Helen's most famous eruption was in 1980. Deffinitions Deffinitions Ring Of Fire- The linear zone of seismic and volcanic activity that coincides in general with the margins of the Pacific Plate. Definitions Ring Of Fire- linear zone of seismic and volcanic activity that coincides in general with the margins of the Pacific Plate. Hot Spot- Any area or place of known danger, intrigue, dissension, or instability. Tiltmeter- An instrument used to measure slight changes in the inclination of the earth's surface, usually in connection with volcanology and earthquake seismology Rift Zone-a system of related, narrow structural depressions between parallel faults. Two weeks after Mount St. Helen's erupted in 1980 ash was still traveling aroud the world. Searing flows of pumice poured from the volcanoes crater during the 1980 eruption. Pyroclastic Material-Composed chiefly of fragments of volcanic origin, as agglomerate, tuff, and certain other rocks. Mount St. Helens is well known for its ash explosions and pyroclastic flows. Sources www.Dictionary.com www.wikipedia.com Google Images www.fs.usda.gov/mountsthelens Ask.com
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