Fissiontrack dating
Fissiontrack dating involves counting the damage tracks left fragments of the spontaneous fission Uranium238. The spontaneous fission of Uranium238 has a known rate, as such the number of tracks is theoretically related to the age of the sample. [1]
Because fissiontrack dating, requires a manual count of the fissiontracks, the process is more prone to human error and bias than other radiometric dating methods. This problem is increased by the fact that there are other types of crystal defects that can easily be counted as fissiontracks.
The Uranium Problem
The leaching of Uranium from the sample can create an artificially old fissiontrack date and a heating event will erase tracks producing artificially young fissiontrack date, thus as with all radiometric dating methods any disagreement between a fissiontrack date and what is expected can be explained away.
Another source of possible error for fissiontrack dating is the possibility that tracks could be made by isotopes with higher spontaneous fission rates than Uranium238. [2] Furthermore neutron bombardment will induce fission in the uranium235 and all fission reactions produce neutrons, use it is likely that some uranium235 induce fission tracks are mistaken for Uranium238.
Conclusion
Finally Like all dating methods it assumes a constant decay rate, how there is evidence that accelerated decay has occurred. If accelerated decay did occur then fissiontrack dating; like all other all radiometric dating methods; is hopelessly in error.
References
 Dating Techniques  Fission Track Dating
 The Mythology of Modern Dating Methods by John Woodmorappe
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See Also
 Radioactivity
 Isochron dating
 Concordia dating
 Radiometric dating problems
 Concordance of dates
 Carbon14 dating
