It's not as easy as it might sound

Carbon 14 atomic number 6 the radioactive nuclide used in dating fossils

Heating of rocks can also release argon. The argon that may either diffuse into the minerals or may be occluded within them is derived by outgassing of K-bearing minerals in the crust and mantle of the Earth. It is also being claimed that the standard deviations are not too large. It is true that an age difference in the hundreds of thousands of years is much too small to account for the observed K-Ar ages.

It wouldn't require many internal cracks to allow a ten millionth part of argon to enter. As the gas bubble explodes, its enclosed argon will be rushing outward along with these tiny bubbles as they cool. In the first place, I am not primarily concerned with dating meteorites, or precambrian rocks. They also pointed out that for the anomalies to be accounted for by excess argon, unreasonably high partial pressures of Ar during crystallization would have to be required.

As the gas bubble explodesIt wouldn't require many

This would be less than one part in a trillion entering the rock each day, on the average. This is when the dinosaurs are assumed to have become extinct. We can also compute how much they differ from one another. But this would require an atom by atom analysis, which I do not believe is practical. It takes a long time to penetrate the confusion and find out what is the hard evidence in this area.

Helens K-Ar dating, and historic lava flows and their excess argon. It seems reasonable that gas would collect at the top of these chambers, causing artificially high K-Ar radiometric ages there.

This will make it more difficult to detect this added argon by the spectrum test described below. Some fossils are found in Precambrian rocks, but most of them are found in Cambrian and later periods. But there are quite a number of rather outstanding anomalies in radiometric dating that creationists have collected. He cites another reference that most igneous bodies have wide biostrategraphic limits.