Helium dating
Encyclopedia
Helium dating may refer to the traditional uranium-thorium dating
Uranium-thorium dating
Uranium-thorium dating, also called thorium-230 dating, uranium-series disequilibrium dating or uranium-series dating, is a radiometric dating technique commonly used to determine the age of calcium carbonate materials such as speleothem or coral...

or uranium-thorium/helium dating.

A relatively new dating method, tritium-helium dating has been developed for determining rates of oxygen utilization in the ocean.
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