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Biology 15 Online
OpenStudy (anonymous):

Because of the property of paleomagnetism ?

OpenStudy (bioepic):

Paleomagnetism is the study of the record of the Earth's magnetic field in rocks, sediment, or archeological materials. Certain minerals in rocks lock-in a record of the direction and intensity of the magnetic field when they form. This was used to prove alfred wagner's theory of continental drift through sea floor spreading.

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