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CCCC Geo 111 Plate Tectonics-1 lab

CCCC Geo 111 Plate Tectonics-1 lab - Shelton Horton Mod 1...

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Shelton Horton Mod 1 Geo 111 Plate Tectonics This Dynamic Earth Who came with the idea of Continental Drift? The idea began with the Greeks but was not a full blown theory until 1912 when a 32- year-old German meteorologist named Alfred Lothar Wegener discussed it in articles. List three types of evidence use to support Continental Drift. a) unusual geologic structures and of plant and animal fossils found on the matching coastlines of South America and Africa b) the remarkable fit of the South American and African continents c) the evidence of dramatic climate changes on some continents. Explain why Continental Drift was not accepted by the scientific community. Wegener's theory was weak in that it could not answer the question of what kind of forces could be strong enough to move such large masses of solid rock over such great distances? Wegener suggested that the continents simply plowed through the ocean floor, but Harold Jeffreys, a noted English geophysicist, argued correctly that it was physically impossible for a large mass of solid rock to plow through the ocean floor without breaking up. What were the 4 major scientific discoveries that spurred the development of the Theory of Plate Tectonics? (1) demonstration of the ruggedness and youth of the ocean floor (2) confirmation of repeated reversals of the Earth magnetic field in the geologic past (3) emergence of the seafloor-spreading hypothesis and associated recycling of oceanic crust
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