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As for the methods used by the ICR research team, they seem to be consistent with other research groups that do fission track dating.
Also, there is absolutely no reason to doubt the credibility of the Geotrack International Laboratory.
The ICR research team sent the collected samples to Geotrack International Laboratory in Melbourne, Australia, because of its specialization in fission track dating of minerals (Snelling 209).
While in Melbourne, minerals were separated from the rock sample because only the hard minerals such as apatite, zircon, sphene, and natural glasses (including obsidian and pitchstone) can be accurately dating using fission tracks.
The zircon grains were chosen for testing and, after a number of grinding and chemical treatment steps in order to prepare the sample, a thin grain (0.25 micro-meters wide) was then put into intimate contact with a mica resin and put into a reactor which irradiated the sample with neutrons in order to induce fission of the remaining Uranium-238 molecules (Geochronology Group 2005).
As these molecules underwent fission, their tracks were etched into the mica resin, as the zircon grain was in effect made two-dimensional because of its small width.
As for the procedures used in fission track dating, first rock samples must be collected from a desired study location.
Fission track dating is somewhat of an anomaly in the field of radiometric dating.