Thank you for your feedback. Instead, it calculates an age from the degree to which secular equilibrium has been restored between the radioactive isotope thorium and its radioactive parent uranium within a sample. U-Pb, Pb-Pb, and fission track dating.
Any text you add should be original, not copied from other sources. U-Pb, Pb-Pb, and fission track dating. Thank you for your feedback. Unlike other types of radioactive dating, Uranium-Thorium U-Th dating doesn't reach a stable end point. The Editors of Encyclopaedia Britannica. Views Read Edit View history.