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Gem Asawachatroj

Tornado Diagram - 0 views

  • erclouds, where a column of strongly rising warm air is set spinning by high winds streaming through the clouds's top. As air is sucked into this swirling column, or mesocyclone, it spins very fast, stretching thousands of feet up and down through the cloud, with a corkscrewing funnel descending f
Rima Touya

Alfred Wegener - Wikipedia, the free encyclopedia - 8 views

  • Alfred Wegener first thought of this idea by noticing that the different large landmasses of the Earth almost fit together like a jigsaw.
  • The Continental shelf of the Americas fit closely to Africa and Europe, and Antarctica, Australia, India and Madagascar fit next to the tip of Southern Africa.
  • He analyzed either side of the Atlantic Ocean for rock type, geological structures and fossils. He noticed that there was a significant similarity between matching sides of the continents, especially in fossil plants.
  • ...7 more annotations...
  • From 1912, Wegener publicly advocated the theory of "continental drift", arguing that all the continents were once joined together in a single landmass and have drifted apart.
  • In his work, Wegener presented a large amount of very strong
  • In 1943 George Gaylord Simpson wrote a vehement attack on the theory
  • evidence in support of continental drift, but the mechanism remained elusive. While his ideas attracted a few early supporters such as Alexander Du Toit from South Africa and Arthur Holmes in England, the hypothesis was generally met with skepticism from largely conservative scientists, who were resistant to any change in the status quo.
  • but G.G.Simpson's influence was so powerful that even in countries previously sympathetic towards continental drift, like Australia
  • Wegener's hypothesis fell out of favour.
    • Annabelle Cheng
       
      Diagram to show evidence
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    How Alfred W. first came up with this theory...
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