Lithosphere

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Lithosphere

  1. 1. Lithosphere<br />Hayato Ishida<br />IB Environmental System SL P.1 <br />
  2. 2. Earth cross section<br />Crust<br />Mantle<br />3. <br /> a- Outer core<br /> b- Inner core<br />4. Lithosphere<br />5.Asthenosphere<br />
  3. 3. Inside the Earth<br />
  4. 4. Plate tectonicstheory<br />Lithosphere -> broken up into tectonic plates. <br />composed of both continental and oceanic crust.<br />Describes the large scale motions of Earth&apos;s lithosphere ride on the denser asthenosphere.<br />Eight major and many <br /> minor plates <br />
  5. 5. Plate tectonics<br /><ul><li>Some plates are </li></ul>a. moving toward each other, <br />moving away, <br />sliding past each other. <br />
  6. 6. Theory of continental drift<br />the movement of the Earth&apos;s continents relative to each other.<br />Influenced disjunct distribution <br /><ul><li>evolution
  7. 7. biodiversity</li></li></ul><li>Disjunct distribution <br />-Sample of Madagascar<br /><ul><li>Madagascar has a highly endemic biota.
  8. 8. Madagascar and India were the first landmasses to splitfrom Gondwanaland 160-120 million years ago.
  9. 9. India and Madagascar separated about 88-63 millionyears ago.
  10. 10. India collides with south Asia about 50 million years ago.
  11. 11. Recent molecular phylogeny supports that dispersalwas a major factor in the formation of the Malagasy biota, and not vicariance.</li></li></ul><li>Animals in Madagascar<br /><ul><li>Chameleons originated in Madagascar and dispersed to Africa, India and the Indian Ocean islands.
  12. 12. Lemurs evolved in Madagascar</li></li></ul><li>

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