Glg 101 - GLG 101 Continental Drift the hypothesis that continents are mobile i Proposed by German meteorologist Alfred Wegener ii Wegener

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GLG 101, August 25, 2010 Continental Drift – the hypothesis that continents are mobile. i. Proposed by German meteorologist Alfred Wegener ii. Wegener hypothesized a former supercontinent, Pangaea. iii. Idea was founded on strong evidence – “fit” of continents, location of glaciations, fossil organisms, rock type and structural similarities, paleoclimates preserved in rocks. Lacking an advocate, the drift hypothesis faded. His idea was revived in the 1950s. Glacial Evidence - Permian glacial till is found on four continents. The tills in Africa and India are now near the equator. Paleoclimatic Evidence – placing Pangaea over the Permian South Pole i. He correctly predicted tropical coals, reefs, subtropical deserts Fossil Evidence – Identical fossils found on widely separated landmasses, Mesosaurus (freshwater reptile), Glossopteris (subpolar plant with heavy seeds) These organisms could not have crossed an ocean. Criticism of Drift
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This note was uploaded on 10/12/2010 for the course GLG 72595 taught by Professor Burt during the Fall '10 term at University of Arizona- Tucson.

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Glg 101 - GLG 101 Continental Drift the hypothesis that continents are mobile i Proposed by German meteorologist Alfred Wegener ii Wegener

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