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    • Geologist working below a cliff near Whanganui, New Zealand.
    Rights: The University of Waikato Te Whare Wānanga o Waikato Published 11 May 2011, Updated 2 April 2025 Size: 6 MB Referencing Hub media

    The geologist working below this cliff near Whanganui uses the principle of superposition to work out that the bottom layer is the oldest, the top layer is the youngest.

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      Relative dating

      Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence. The method of reading the order is called stratigraphy (layers of rock are called strata) ...

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