Earth science 9.1
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Earth science 9.1

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Earth science 9.1 Earth science 9.1 Presentation Transcript

  • 9.1 Continental Drift
  • Continental drift• A hypothesis that originally proposed that the continents had once been joined to form a single supercontinent
  • Pangaea• the proposed supercontinent that 200 million years ago began to break apart and form the present landmasses
  • Key Concept• Wegener’s continental drift hypothesis stated that the continents had once been joined to form a single supercontinent
  • Key Concept• Fossil evidence for continental drift includes several fossil organisms found on different landmasses.
  • Key Concept• Rock evidence for continental drift exists in the form of several mountain belts that end at one coastline, only to reappear on a landmass across the ocean.