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oct 1, 1962 - Harry H Hess

Description:

He theorized that the ocean floors are spreading outwards from their ridges. He proposed that the spreading center would contain rising magma. The rock closer to the ridge was younger than the rock further from the ridge.

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ByJulia Dooling
10 Jan 2020
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244

Date:

oct 1, 1962
Now
~ 63 years ago

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