Deep Blue Lake or Crater Lake

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Introduction: Crater Lake was discovered in 1853 by a few miners from California. After being forgotten, rediscovered and renamed from “Deep Blue Lake” to “Lake Majesty”, Crater Lake finally captured its name by a newspaper editor Jim Sutton. Although Crater Lake was discovered in 1865, it was created over 7,000 years prior to its discovery. Crater Lake was not always Crater Lake either, but was once Mount Mazma, a stratovolcano, which once stood roughly 12,000 feet high. Crater Lake is constructed of different types of volcanic rock, has been a part of different eruptions and has had much activity since it was once Mount Mazma. Due to the volcanic threats that are still provided from the lake and its surrounding cinder cones, hazard mitigation, monitoring and monitoring is vital to nearby locations. All of these important topics will be discussed further in the continuing paragraphs. Geological History: Before Crater Lake was indeed Crater Lake, it was once a 12,000 foot high stratovolcano known as Mount Mazma. Mt. Mazma was created from overlapping shield and composite volcanoes during the past 400,000 years. Mount Mazma was a very active volcano to say the least with its first lavas and pyroclastic rock created 400,000 years ago followed by lava flows, lava sheets and small pyroclastic explosions creating small cinder cones, lava fields and small shield volcanoes close by. The rocks that were involved were mainly basalt, mafic andesite, andesite, dacite and in the later years rhyodacite. About 50,000 years ago is when much of the activity had calmed down with Mount Mazma. As the complexity of the volcano continued to grow so did the silica content in the magma and the viscosity of the lava. Both of these trap explosive gases... ... middle of paper ... ...ebsite. U.S Geological Survey, 2008. Web. 2 Nov. 2013. 3.) "Crater Lake | Volcano World." Crater Lake | Volcano World. Department of Geoscience Oregon State University, n.d. Web. 4 Nov. 2013. 4.) Klimasauskas, Ed, Charles Bacon, and Jim Alexander. "Mount Mazama and Crater Lake: Growth and Destruction of a Cascades Volcano." Mount Mazama and Crater Lake: Growth and Destruction of a Cascades Volcano. National Park Service, Oregon State University, University of New Hampshire, Crater Lake Natural History Association, 17 May 2005. Web. 7 Nov. 2013. 5.) "Pyroclastic Surges - Earthquake Hazards, Crater Lake." Pyroclastic Surges - Earthquake Hazards, Crater Lake. Crater Lake Institute, n.d. Web. 08 Nov. 2013 6.) "Cascades Volcano Observatory Monitoring Cascade Volcanoes." Cascades Volcano Observatory Monitoring Cascade Volcanoes. N.p., 05 Sept. 2013. Web. 11 Nov. 2013.

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