<skos:prefLabel xml:lang="en">uranium-thorium dating</skos:prefLabel>
<skos:altLabel xml:lang="en">dating, uranium-thorium</skos:altLabel>
<skos:altLabel xml:lang="en">U-Th dating</skos:altLabel>
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<skos:note xml:lang="en">Radiometric dating method which measures the age of igneous calcium carbonate materials. The technique calculates the degree to which radioactive thorium-230 isotopes within a sample have reestablished secular equilibrium with their parent uranium-234 isotopes.</skos:note>
<skos:notation>300386639</skos:notation>
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