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jan 7, 1962 - Harry H. Hess

Description:

Harry Hess created the theory of sea floor spreading. He discovered that the ocean was shallow in the middle and called it Mid Ocean Ridges.

Added to timeline:

Tectonic Plates Timeline: Kyle Klodnick

ByKyle Klodnick

11 Jan 2018

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Date:

jan 7, 1962

Now

~ 63 years ago

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