What is uranium dating used for

Thus any of the radioactive isotopes and its lead daughter product can be used for dating, or a combination may be used.In addition, some of the longer-lived intermediate daughter products have uses in dating.

In addition there is another stable isotope, lead 204, that is entirely primordial and does not form via radioactive decay at all.U-235 decays much faster than U-238 (700 my and 4500 my, respectively).Also, Lead 206 forms only from the decay of U-238 and Lead 207 only from the decay of U-235.However, such methods are far from perfect: it is difficult to gain accurate depositional ages for sedimentary rocks, and matters can be further complicated when millions of years of geologic and environmental forces cause erosion of fossil-bearing strata.Fossils can even migrate from their original positions within strata.

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