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Plate tectonics

Plate tectonics. Mountain building and Volcanoes. Mountain building. A major force shaping the land is uplift Moving plates uplift land, forming mountains Three types of mountains are: Folded mountains Fault-block mountains Volcanic Mountains .

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Plate tectonics

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  1. Plate tectonics Mountain building and Volcanoes

  2. Mountain building • A major force shaping the land is uplift • Moving plates uplift land, forming mountains • Three types of mountains are: • Folded mountains • Fault-block mountains • Volcanic Mountains. Each forms by a different type of plate movement.

  3. Folded mountains • Formed when plates collide resulting in a formation of a fold or bulge, which becomes a mountain range. • Try this • Place a sheet of paper flat on your desk. Place a hand on one edge of the paper. Push your other hand against the free edge of the paper. What happens?

  4. Folded mountains • Examples of folded mountains Include • The Rocky Mountains of North America • The Andes of South America • The Alps of Central Europe • The Himalayas of Asia

  5. Himalayas

  6. Fault-block mountains • Formed when blocks of Earth’s crust on either side of a fault are dropped below or pushed above the surrounding land • This happens where sections of crust are pulling apart or together

  7. Fault-block mountains • Examples of Fault-block mountains include: • The Sierra Nevadasof California • Wasatch Range of Utah • Teton Range of Wyoming

  8. Sierra Nevadas

  9. Volcanic mountains (Volcanoes) • Formed when material from inside Earth reaches the surface • They are most common at plates boundaries (convergent and divergent) • They are classified into three types based on how they form • Cinder cone volcanoes • Shield volcanoes • Composite volcanoes (Stratovolcanoes)

  10. Cinder cone volcanoes • Cone-shaped mound • Formed from cinders, ash, dust • Sudden, violent eruption Examples: • Mount Paracutin, Mexico, Isalco, and El Salvador

  11. Cinder cone volcanoes

  12. Cinder Cone volcano eruption

  13. Shield volcanoes • Low, gently-sloped sides • Formed from layers of cooled lava • Slow, gentle eruption Examples: • Mauna Loa, and Kea

  14. Shield volcano (erta ale)

  15. ertaale eruption

  16. Stratovolcanoes • Cone-shaped mound, steep sides • Formed from alternating layers of ash and lava • Both violent and gentle eruptions Examples: • Mount St Helens, Egmont, and New Zealand

  17. Stratovolcano

  18. Stratovolcano eruption

  19. Resources • http://www.youtube.com/watch?v=g7OTVUY_PdQ • http://www.youtube.com/watch?v=WgktM2luLok • http://www.youtube.com/watch?v=WwBVG0Si7rs • http://www.youtube.com/watch?v=yRH1PAJGlvo • http://www.youtube.com/watch?v=xP2dreOI8gI

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