Other Evidence for Evolution

Absolute Dating

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Christian Bien Portrait_edited.jpg

Ben Whitten

Learning Objectives

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What is absolute dating?
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Absolute dating methods enable us to give actual age to a fossil, artefact or rock (in years) – examples of absolute dating methods include carbon-14 dating, potassium-argon dating, and tree-ring dating.


Absolute dating methods depend on the regular repetition of any event, such as the decay of unstable nuclei to stable nuclei.


The proportion of a radioactive isotope in a sample of material can be measured, and by knowing the half-life of a particular radio-isotope, the sample's age can be worked out.

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What is carbon-14 dating?
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What is Potassium-argon dating?
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What is dendrochronology?
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