[RaceBannon]

It still isn't sufficient. Too many reports of different dates from differetn labs, even within the same lab. Also has to assume there is a certain amount of parent atom to 'prove' decay rate is accurate.

[stanz]

True, but it allows for a range of dating fossil material in igneous formations which are anywhere from 100,000 to 2,000,000 years old. There are problems such as the amount of argon and/or potassium present in volcanic rock and also, the material can only be dated to as far back as the last molten period. But,as a means of estimating relative age of fossils, it is a generally dependable method- - -plus or minus the fluctuations from one lab to another.