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Paleobiogeography

Paleobiogeography. Biogeography (ENVR333) Fall 2007 5 October 2006. PaleoBiogeography. Time Scale Theory of Continental Drift and Plate Tectonics The Breakup of Pangea Biogeographic Implications of a Dynamic Geography. Geologic Time Scale. (Fig 7.1 MacDonald 2003).

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Paleobiogeography

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  1. Paleobiogeography Biogeography (ENVR333) Fall 2007 5 October 2006

  2. PaleoBiogeography • Time Scale • Theory of Continental Drift and Plate Tectonics • The Breakup of Pangea • Biogeographic Implications of a Dynamic Geography

  3. Geologic Time Scale (Fig 7.1 MacDonald 2003)

  4. Theory of Continental Drift • Alfred Wegener (1880-1930) • 1915 The Origin of Continents and Oceans • Pangea = supercontinent

  5. Evidence for Continental Drift Glacial deposits Matching shapes Similar rock types and structures Continuity of plant and animal fossils

  6. Plate Tectonics Fig 7.5 MacDonald 2003)

  7. Plate Tectonics

  8. connectivity Pangea 200 million km2 or 40% of earth’s surface

  9. Break up of Pangea Laurasia Tethyan Seaway Gondwanaland

  10. Break up of Pangea

  11. Cenozoic Changes India rafts into Asia (45 mya) Africa and Europe rejoin (17 mya) Stepping Stone Islands created (15 mya) Central American Landbridge (6mya) Epicontinental seas disappear

  12. http://www.clearlight.com/%7Emhieb/WVFossils/continents.html

  13. Biogeographic Implications Speciation

  14. Biogeographic Implications Corridors and Barriers Great American Interchange

  15. Biogeographic Implications Corridors and Barriers 12,000 ybp Beringia today

  16. Biogeographic Implications Marine-Climate effects

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