Radiometric dating relies on the constant rate of decay of Sexhookup dating sites uganda
Zircons will loose their tracks at higher temperatures of 200.
The tracks will then begin to accumulate when the rock begins to cool.
By determining the number of tracks present on a polished surface of a grain and the amount of uranium present in the grain, it is possible to calculate how long it took to produce the number of tracks preserved.
At about 50 000 to 60 000 years, the limit of the technique is reached (beyond this time, other radiometric techniques must be used for dating).Any material which is composed of carbon may be dated.Herein lies the true advantage of the radiocarbon method.If the rock containing these minerals is heated, the tracks will begin to disappear.If the rock is heated high enough, 120C for apatite, all tracks will disappear.