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Introduction to Continental Drift and Plate Tectonics (United Streaming Video)

Continental Drift and the Theory of Plate Tectonics. Introduction to Continental Drift and Plate Tectonics (United Streaming Video)

marah-rutledge
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Introduction to Continental Drift and Plate Tectonics (United Streaming Video)

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  1. Continental Drift and the Theory of Plate Tectonics Introduction to Continental Drift and Plate Tectonics (United Streaming Video) Continents Adrift: An Introduction to Continental Drift and Plate Tectonics. Rainbow Educational Media(1995). Retrieved April 23, 2008, fromunitedstreaming: http://streaming.discoveryeducation.com/

  2. Theory of Continental Drift Alfred Wegener stated that the continents move, and over time have come together and moved apart again (2008). The Earth. Retrieved April 29, 2008, from Enchanted Learning Web site: http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml

  3. Evidence for Continental Drift 1. Similarities in the coastlines of the continents Pompa, Plate Tectonics Mini Lecture. Retrieved April 29, 2008, from Gateway School District Web site: http://www.gasd.k12.pa.us/~dpompa/Mini%20Lecture.html

  4. Evidence for Continental Drift 2. Identical fossil remains found in different continents Pompa, Plate Tectonics Mini Lecture. Retrieved April 29, 2008, from Gateway School District Web site: http://www.gasd.k12.pa.us/~dpompa/Mini%20Lecture.html

  5. Evidence for Continental Drift 3. Age and type of rocks in different continents match up Pompa, Plate Tectonics Mini Lecture. Retrieved April 29, 2008, from Gateway School District Web site: http://www.gasd.k12.pa.us/~dpompa/Mini%20Lecture.html

  6. Evidence for Continental Drift 4. Evidence of changes in climatic patterns Pompa, Plate Tectonics Mini Lecture. Retrieved April 29, 2008, from Gateway School District Web site: http://www.gasd.k12.pa.us/~dpompa/Mini%20Lecture.html

  7. Evidence for Continental Drift 5. Seafloor spreading (2004, October 4). Geology . Retrieved April 29, 2008, from National Park Service Web site: http://www.nature.nps.gov/geology/usgsnps/animate/A48.gif

  8. Lithospheric Plates • The earth's surface is made of two types of crust • Thinner, denser oceanic crust, made from mafic lava • Thicker, less dense continental crust, made from felsic lava • These two types of crust make up the earth's lithospheric plates (2008, January 25). Earthquakes Hazards Program. Retrieved April 30, 2008, from USGS Web site: http://earthquake.usgs.gov/learning/glossary.php?termID=57

  9. Lithospheric Plates Presently, 15 major lithospheric plates and 39 minor lithospheric plates exist. There are 12 others that have been identified, but no longer exist.

  10. Lithospheric Plate Boundaries 3 types of plate boundaries: A. Divergent B. Convergent C. Transform Fault Pompa, Plate Tectonics Mini Lecture. Retrieved April 29, 2008, from Gateway School District Web site: http://www.gasd.k12.pa.us/~dpompa/Mini%20Lecture.html

  11. Lithospheric Plate Boundaries • Divergent Boundaries • Two plates moving apart • Example: along the Mid-Atlantic ridge (2005). Plate Boundaries. Retrieved April 29, 2008, from Plate Tectonics Web site: http://www.platetectonics.com/book/page_5.asp

  12. Lithospheric Plate Boundaries • Convergent Boundaries • Two plates moving toward each other • Example: Himalaya mountains Watson, J. M. (1999, May 5). Understanding plate motions. Retrieved April 29, 2008, from USGS Web site: http://pubs.usgs.gov/gip/dynamic/understanding.html#anchor15039288 (2005). Mountain Ranges. Retrieved April 29, 2008, from Plate Tectonics Web site: http://www.platetectonics.com/book/page_5.asp

  13. Lithospheric Plate Boundaries • Transform Fault Boundaries • Two plates grinding past each other • Example: San Andreas Fault, CA (2006, May 26). Western Earth Surface Processes Team. Retrieved April 29, 2008, from USGS Web site: http://geomaps.wr.usgs.gov/socal/geology/inland_empire/socal_faults.html Watson, J. M. (1999, May 5). Understanding plate motions. Retrieved April 29, 2008, from USGS Web site: http://pubs.usgs.gov/gip/dynamic/San_Andreas.html

  14. Lithospheric Plate Boundaries Seafloor Spreading • Diverging tectonic plates • Oceanic and oceanic crust moving apart • Results in a mid-ocean ridge • “New” crust is created at these boundaries (2007). Mid-Ocean Ridges. Retrieved April 25, 2008, from Water Encyclopedia Web site: http://www.waterencyclopedia.com/Mi-Oc/Mid-Ocean-Ridges.html A topography (relief) map showing the world’s mid-ocean ridge system

  15. Convergent Plate Boundaries Oceanic-oceanic plate convergence = Island Arc Formation Old crust is “destroyed” at these boundaries as one plate slides under the other All photos from: (2005). Plate Boundaries. Retrieved April 23, 2008, from Plate Tectonics Web site: http://www.platetectonics.com/book/page_5.asp

  16. Convergent Plate Boundaries Oceanic-continental plate convergence = Volcano Formation (also known as a volcanic arc) Old crust is “destroyed” at these boundaries as the denser oceanic crust slides under the lighter continental crust All photos from: (2005). Plate Boundaries. Retrieved April 23, 2008, from Plate Tectonics Web site: http://www.platetectonics.com/book/page_5.asp

  17. Convergent Plate Boundaries Continental-continental plate convergence = Mountain Formation Since both plates are of equal density, they crash into each other and bend and fold upward All photos from: (2005). Plate Boundaries. Retrieved April 23, 2008, from Plate Tectonics Web site: http://www.platetectonics.com/book/page_5.asp

  18. Convergent Plate Boundaries Subduction zone Occurs at convergent plate boundaries Thinner, denser oceanic crust sliding under oceanic or continental crust Results in an ocean trench (2003, April 4). The Mariana Trench. Retrieved April 30, 2008, from The Mariana Trench Web site: http://www.marianatrench.com/mariana_trench-oceanography.htm The Ocean Trench. Retrieved April 30, 2008, from Think Quest Web site: http://library.thinkquest.org/22752/Sea%20Structure/Trench.html

  19. Subduction zone • Converging tectonic plates • Oceanic crust sliding under continental crust • Results in volcanoes/volcanic arc Huber, N. K. (1987). The Geologic Story of Yosemite National Park . Retrieved April 30, 2008, from Yosemite Web site: http://www.yosemite.ca.us/library/geologic_story_of_yosemite/genesis.html

  20. Causes of Plate Motion • Said to be the driving force behind plate tectonics • Hot material rises, moves away from the heat source, cools and sinks • Convection within the mantle

  21. Predicted plate movement for the future Present and future lithospheric plate motion Listed on the table to the right are the speeds of some of the earth’s lithospheric plates, relative to the North American Plate (as if the N. Am. Plate were still). These speeds were calculated using thePlate Motion Calculator

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