In 3-5 sentences, describe how paleomagnetic evidence supports the theory that continents change position (drift) over time.

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Cheyenne Melton

Biology

4 September, 20:04

In 3-5 sentences, describe how paleomagnetic evidence supports the theory that continents change position (drift) over time.

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Hugo Quinn · Answer 1

The earth magnetic field changes direction and its strength varies from year to year. This results in magnetic anomalies within a rock body as magnetic elements and minerals records the changing direction of the magnetic field.

As new magma is brought near the mid-oceanic ridge, the older ones are pushed backwards and they show a different magnetic field direction from the cooling magma. This is usually evident in the orientation of the magnetic minerals.