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23h 6min, may 9, 1960 y - Harry Hess

Description:

Discovered by Harry Hess in the 1960s, Seafloor spreading is when the seafloor separates and mantle comes in through the cracks. When the mantle comes in contact with the water, it hardens and forms rock. (Seafloor Spreading)

Added to timeline:

8 months ago
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94
Project

Date:

23h 6min, may 9, 1960 y
Now
~ 58 years ago

Images:

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