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6 August, 23:19

How the polarity of Earth's magnetic field is recorded in the sea-floor

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Answers (2)
  1. 7 August, 01:05
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    The lava extrudes from the underground of earth
  2. 7 August, 02:57
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    the lava the extrudes from mid-ocean ridges

    Explanation:

    the lava will turn into rock that becomes magnetized and acquires the magnetic polarity that existed when the lava cooled. This process continues repeatedly and is a form of record of the Earth's changing magnetic polarity.
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