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dec 18, 1920 - Motonori Matuyama

Description:

Motonori Matuyama discovered magnetic reversal in the 1920s. As magma particles freeze, they freeze in the direction of the magnetic field. So, as seafloor spreading occurs, you can tell the different layers because of magnetic reversal.

Added to timeline:

8 months ago
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Date:

dec 18, 1920
Now
~ 97 years ago

Images:

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