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Plate Tectonics Versus Earth Crust Displacement???


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Author Topic: Plate Tectonics Versus Earth Crust Displacement???  (Read 904 times)
Carolyn Silver
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« on: September 27, 2009, 04:50:06 am »

Continental Drift

Although a few early thinkers pointed out that continents may have moved laterally, the first true direct challenge to the fixist view of the Earth came in 1915 with Wegener's proposal of continental drift.
Early Ideas

    * F. B. Taylor (1908) - Creeping Crustal Sheets
          o Pre-Tertiary Earth consisted of large continents occupying polar regions
          o A deforming force set continents creeping equator-ward, thrusting continental material over oceanic crust. Leading edge of sheets formed mountain belts.
          o Deforming force was thought to be tidal, including possiblity of additional tidal forces due to moon capture in the Cretaceous. Gave explanation for non-random occurrence of mountain belts (wrinkle model implies random).
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