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How Do Tectonic Plates Rock our World?

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Krista Martin

on 13 February 2013

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Transcript of How Do Tectonic Plates Rock our World?

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli By: Krista M. Mount St. Helens Just a little background info on...
Boundaries Convergent Boundaries
Divergent Boundaries
Transform Boundaries Mount St. Helen Fun Facts Mount St. Helens has erupted more frequently than any other Volcano in the Cascade Range over the last 4,000 years Mount St. Helens is... Located in Scamania County, Washington
A stratovolcano, which is a cone-shaped volcano composed of many layers of volcanic ash, hardened lava, pumice, and tephra.
Mount St. Helens erupted 5 times in the 20th century and once in the 21st (2004-2008)
The 1980 eruption was described as the "...deadliest and most economically destructive volcanic event in the history of the United States" ~ NOAA, 'Teachers Guide to Stratovolcaonoes of the World' Facts & Figures Bibliography Caroline D., Liz W., Lisa F., Peter F., Jeanne B., Michael C., 2013. 30 Cool Facts about Mount St. Helens. [online] Available at: http://pubs.usgs.gov/gip/103/. [Accessed 6/2/13].
NA. NA. Teachers Guide to Stratovolcanoes of the World. [ONLINE] Available at: http://www.ngdc.noaa.gov/hazard/stratoguide/helenfact.html. [Accessed 10 February 13].
NA. 2013. Stratovolcano. [ONLINE] Available at: http://en.wikipedia.org/wiki/Stratovolcano. [Accessed 10 February 13].
Nye, Bill. 2013. Mt. St. Helens this week. [ONLINE] Available at: http://www.billnye.com/mt-st-helens-this-week/. [Accessed 10 February 13].
NA. 2013. The Seattle Traveler . [ONLINE] Available at: http://www.theseattletraveler.com/2007/02/206/. [Accessed 10 February 13].
NA. 2013. Mount St. Helens. [ONLINE] Available at: http://en.wikipedia.org/wiki/Mount_St._Helens. [Accessed 10 February 13].
NA. 2013. Timeline: The life of Mount St. Helens. [ONLINE] Available at: http://www.thenewstribune.com/2010/05/17/1189349/news-brief-17sttimes.html. [Accessed 10 February 13].
Colasurdo, C. 1809. History of Mount St. Helens. [ONLINE] Available at: http://mshinstitute.org/index.php/news_and_research/history_of_msh. [Accessed 11 February 13].
NA. 2013. Harry Randall Truman. [ONLINE] Available at: http://en.wikipedia.org/wiki/Harry_Randall_Truman. [Accessed 11 February 13]. When tectonic plates collide with each other When tectonic plates drift apart When tectonic plates slide past each other At Transform boundaries you can find
Earthquakes
Volcanoes (relatively uncommon) At Divergent boundaries regular occurrences are
Sea floor spreading
Rift valleys At Convergent boundaries the most commonly found 'terrains' are: volcanoes, mountain ranges, and trenches The cloud of volcanic ash floated Eastward across the United States in three days, encircling the earth in fifteen Volcanic ash rose in a vertical spiral within 15 minutes During the 1980 to 1986 and the 2004 to 2008 eruptions 7% of the volume lost in 1980 was restored because of the domes higher than the Empire State Building caused by the lava that oozed onto the crater floor Snow and rock have been gathering since 1986, forming the world's youngest glacier fittingly named 'Crater Glacier' The devastated landscape caused by the eruption is now home to many plants and animals As Caroline D., Liz W., Lisa F., Peter F., Jeanne B. and Michael C. Said in '30 Cool Facts about Mount St. Helens', 2013. Present day 40,000 BP (before present time) 1st Mt. St. Helens eruption 4,000 BP Roughly the time the eruptions that shaped most of Mt. St. Helens started An eruption approximately 4 times the size of the explosion in 1980 3,600 BP The volcano is named after Baron St. Helens by Captain George Vancouver 1792 Eruptions are reported by explorers 1847 1857 1980 Rumbling beneath Mt. St. Helens is a 5.1 earthquake that triggers the most economically destructive volcano in the history of the U.S. 2004 2008 Oozing onto the crater floor is an additional 125 million cubic yards of material Mount St. Helens and Tectonic Plates Mt. St. Helens sits on a 'triple plate junction' of the North American Plate, the Pacific Plate, and the Juan de Fuca Plate. Mt. St. Helens was caused by convergent boundaries, specifically the tiny oceanic Juan de Fuca Plate subducted by the North American Plate. 57 people were killed during the 1980 eruption Harry Truman, at the age of 83, adamantly refusing to leave his home, his last words being, "If the mountain goes, I'm going with it." The earthquake that triggered Mt. St. Helens eruption occured at 8:32 a.m. The eruption lasted for over 9 hours. The blast from the volcano was 600-degree Fahrenheit (315 Celsius) 650 mph wind full of gas, rock and ash swept over a 230 sq. miles area on a destruction rampage. RainforestGirl. 2011. Plate Boundaries. [ONLINE] Available at: http://tasaclips.com/illustrations/Convergent_Boundary.jpg. [Accessed 12 February 13].
NA. NA. Plate Tectonics. [ONLINE] Available at: http://www.gweaver.net/techhigh/projects/period1_2/Yellowstone/Images/transform.jpeg [Accessed 12 February 13].
NA. 2013. Divergent Plate Boundaries. [ONLINE] Available at: http://geology.com/nsta/divergent-plate-boundaries.shtml. [Accessed 12 February 13].
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