[Junior]

All of them are based on the observable decay rates and resultant ratios of parent/daughter isotopes. And, the fact that multiple dating methods agree with one another is an indication of their accuracy.

[music_code]

All of them are based on the observable decay rates and resultant ratios of parent/daughter isotopes. And, the fact that multiple dating methods agree with one another is an indication of their accuracy.

These methods are far from infallible and are based on three arbitrary assumptions: a constant rate of decay, an isolated system in which no parent or daughter element can be added or lost, and a known amount of the daughter element present initially.

Hope this clears up your confusion.