Uranium–lead dating is the geological age-determination method that uses the radioactive decay of uranium (U) isotopes (238U, 235U, and also in this entry 232Th) into stable isotopes of lead (Pb) (206Pb, 207Pb, and 208Pb, respectively). U–Pb geochronology is the science of both the methodology but also the application of these methods to geological problems.
U–Pb decay system and age calculations
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