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L05 Plate tectonics 1

L05 Plate tectonics 1 - GEOL 107 L5 1500 s to 1850 s S Am...

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GEOL 107 Ͳ L5 8/31/11 1 Plate Tectonics 1 1835 1500 s to 1850 s S. Am and Africa seemed to fit together 1596 Abraham Ortelius (Dutch Cartographer) first to say continents joined together then separated 1620 Sir Francis Bacon noted similarity in shapes of continents. 1850 s to 1940 s Distribution of fossils Glacial evidence New Theory: Continental Drift Fossil Distribution Glossopteris flora S.Am., Af., Ind., Aust., Ant. G G G G G Fossil Distribution Mesosaurus freshwater reptile S.Am, Af.
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GEOL 107 Ͳ L5 8/31/11 2 G G G G M M G Fossil Distribution Lystrosaurus Land reptile Af., Ind., Ant. G L G G G M M L L G ready? G L G M M G G G G G L L 300 Million Year Old Glacial Rocks Glacial rocks distribution and ice flow directions.
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GEOL 107 Ͳ L5 8/31/11 3 GLACIAL STRIATIONS South Africa GROOVES MADE BY PASSING GLACIER First Theory Continental Drift Idea that continents move horizontally over Earth s surface Wegener (1910) DuToit (1930 s) Major Problem: no mechanism how could continents move?
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