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Explain the formation of the earth based on the continental drift theory

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  • The earth was a single sialic land mass called Pangaea surrounded by a huge ocean called Panthalasa whose floor was a mass of sima.
  • Pangaea broke into two parts called Laurasia (N. Hemisphere) which lay around equator and Gondwanaland (S. Hemisphere) which lay around south pole which were separated by a narrow ocean called Tethys (the present Mediterranean Sea). 
  • Laurasia broke into Laurentian Shield and Fennoscandia (Europe, Asia and N. America) and moved northwards to their present positions.
  • Gondwanaland broke into Africa, Australia, S. America and Antarctica and India subcontinent.
  • Africa and India drifted northwards.
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