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jan 1, 1962 - Sea floor spread.

Description:

Harry Hess invents the theory of sea floor spread by observing that the crust in the newest in the middle and the oldest at continental margins. This suggests that molten basalt erupts from the center of the ocean and pushes the plat outwards.

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Tectonic plates

ByCharley
17 hours ago
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Date:

jan 1, 1962
Now
~ 63 years ago
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