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  • Rights: The University of Waikato Te Whare Wānanga o Waikato Published 11 May 2011 Size: 56 KB Referencing Hub media

    Changes in magnetic polarity are preserved in rocks of the ocean crust. This diagram shows the barcode pattern of magnetic reversals over the last 3 million years. All the stripes have been dated, but for clarity, only some are shown.

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