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Word Count: 421
Mount St Helens is a young volcano that developed over the last 40000 years within a very ruff terrain of metavolcanic rocks Mount St Helens was givens its 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 HMSDiscovery 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 shiny cap of perennial snow and ice is now almost gone On May 18 1980 the missing mountaintop was transformed in a few hours into the extensive volcanic ash that covered much of the Northwestern United States and into various other deposits closer to the mountain Mount St Helens was recognized as a volcano as early as 1835The peak rose more than 5000 feet above its base where the lower side merge with near by ridges The mountain is about 6 miles across at its base which is an altitude close to 4400 feet on the northeastern side and about 4000 feet elsewhere At the pre-eruption timberline the width of the cone was about 4 miles The pre-eruption landscape was dominated by dense coniferous forests and clear streams and lakes When Mount St Helens erupted On May 18 1980 after nearly two months of local earthquakes and steam eruptions Mount St Helens suddenly began a major explosive eruption directed first northward and then upward The lateral blast damaged and or covered more than 150 square miles of forest and recreation area killed many animals and left about 60 people dead or missing The 9-hour eruption the huge debris avalanche that immediately followed it and the periodic eruptions during the following 3 days removed about 4 billion cubic yards of new magma like material and the upper and northern parts of the mountain including about 170 million cubic yard of glacial snow and
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