How does magnetism helps support Plate Tectonic Theory.

During times of normal magnetic polarity, the rocks being created stayed normal. ... If they were created during times of reverse polarity, the rocks would freeze that magnetic orientation in place. The earth's magnetic field is always changing direction, which causes the iron in the crust to point/move north and south. ... Since the magnetic field is moving, the iron in the crust will show which was north and south billions of years ago. By this, we can conclude that plate tectonics is a valid theory

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