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Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
Plate Tectonics II
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Plate Tectonics II

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  • 1. T- 1-855-694-8886 Email- info@iTutor.com By iTutor.com
  • 2.  Imagine a single plate, moving in one direction on Earth’s surface.  One edge of the plate—the divergent boundary—moves away from things.  The opposite edge—called the leading edge or convergent boundary bumps into anything in the way. © iTutor. 2000-2013. All Rights Reserved Plate Boundaries
  • 3. Plate Boundaries  An edge of a lithospheric plate that slides by another plate is called a transform fault boundary. © iTutor. 2000-2013. All Rights Reserved
  • 4. © iTutor. 2000-2013. All Rights Reserved Plate Boundaries
  • 5.  Divergent boundaries are found in the ocean as mid- ocean ridges.  A divergent boundary is the line between two plates where they are moving apart.  This type of boundary is found over the rising plume of a mantle convection cell.  Divergent boundaries can also be found on continents as rift valleys.  When a rift valley forms on land, it may eventually split the landmass. © iTutor. 2000-2013. All Rights Reserved Plate Boundaries
  • 6. Divergent Boundaries © iTutor. 2000-2013. All Rights Reserved
  • 7. Convergent Boundaries  When oceanic plates collide, one subducts under the other.  This forms a valley in the ocean floor called a trench. © iTutor. 2000-2013. All Rights Reserved
  • 8. Convergent Boundaries  There are three styles of convergent plate boundaries  Continent-continent collision  Continent-oceanic crust collision  Ocean-ocean collision Continent-continent Ocean-ocean collision Continent-oceanic © iTutor. 2000-2013. All Rights Reserved
  • 9. Convergent Boundaries Ocean-ocean collision © iTutor. 2000-2013. All Rights Reserved
  • 10.  The oceanic plate must subduct under the continental plate.  A continental plate is simply too buoyant to subduct under an oceanic plate. © iTutor. 2000-2013. All Rights Reserved Convergent Boundaries
  • 11. Collision of Nazca and south American Plates Continent- oceanic crust collision © iTutor. 2000-2013. All Rights Reserved
  • 12. Mountains And Convergent Boundaries  The continents cannot be sucked into the trench because their granite rocks.  The two continents collide!  Mountain ranges are formed when continents collide. © iTutor. 2000-2013. All Rights Reserved
  • 13. Formation of Himalayas  India used to be an island, but about 15 million years ago it crashed into Asia (see map).  As continental crust was pushing against continental crust the Himalayan mountain belt was pushed up.  ―Mountains‖ were also pushed down into the mantle as the normally 35 km thick crust is approximately 70 km thick in this region. Mt Everest is the highest altitude mountain on our planet standing 8,840 meters high. This means that below the surface at the foot of the mountain the crust is a further 61 km deep!! © iTutor. 2000-2013. All Rights Reserved
  • 14. Transform Boundaries  Where plates slide past each other  The third type of boundary are transform boundaries, along which plates slide past each other.  The San Andreas fault, adjacent to which the US city of San Francisco is built is an example of a transform boundary between the Pacific plate and the North American plate. © iTutor. 2000-2013. All Rights Reserved
  • 15. Transform Fault Boundaries  A good clue for locating transform faults is offsetting.  When seen from above, the feature will appear to make a zig – zag . © iTutor. 2000-2013. All Rights Reserved
  • 16. Slickenslides, evidence of plate boundaries  The effect of rock moving against rock is evidence of plate boundaries.  The rock surface moving to the right is called slickensides because it is smooth and polished. © iTutor. 2000-2013. All Rights Reserved
  • 17. © iTutor. 2000-2013. All Rights Reserved
  • 18.  Hot mantle plumes breaching the surface in the middle of a tectonic plate What are Hotspot Volcanoes? The Hawaiian island chain are examples of hotspot volcanoes. © iTutor. 2000-2013. All Rights Reserved
  • 19. Where do earthquakes form? Figure showing the tectonic setting of earthquakes
  • 20. The End Call us for more Information: www.iTutor.com 1-855-694-8886 Visit

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