Age determination from uranium decay to lead, commonly in zircon; initial lead, inheritance and later loss or growth must be assessed.
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Uranium-lead dating is a radiometric dating method used to determine the age of rocks and minerals, particularly those that contain uranium-bearing minerals such as zircon. This technique is based on the radioactive decay of uranium isotopes—specifically uranium-238 (U-238) and uranium-235 (U-235)—into stable lead isotopes (lead-206 and lead-207, respectively).