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  • Core sample from the Tikorangi limestone.
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 3 October 2012 Size: 120 KB Referencing Hub media

    The tiny cracks and fissures present in the Tikorangi limestone have been filled with hydrocarbons. These were formed in sediments lying below the limestone and have migrated upwards.

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