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jan 1, 1962 - Harry Hess's Theory of Seafloor Spreading In 1962, Harry Hess proposed that the convection currents caused the sea floor to spread out from a central point, taking the continents with it.

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Plate Tectonics

ByJian SOO
1 Oct 2018
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jan 1, 1962
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~ 63 years ago
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