Radiometric dating becomes impossible when
However, since we are primarily concerned with the Creationist challenge, the main worry will concern subsequent additions.
In some crystalline structures it can be trapped mechanically, but for other naturally occurring minerals it can be shown that this does not occur.
These techniques are somewhat similar to the radiometric methods of dating rocks, which I shad consider in a little more detail.
(For an excellent overview of the various ways of assigning an age to the universe, and an exposition of the radioactive decay method, see Schramm 1974.)Although the clear consensus of physical techniques is that the universe is billions of years old, and although this result controverts the claims of at least some contemporary Creationists, the principal Creationist attack has been directed against the standard geological claim that the earth is about 4.5 billion years old.
Hence, in the case of these minerals, we can conclude that no argon was originally present; that is, D = 0.
The chief defect of the potassiumargon method is that, under the action of heat or compression, argon can escape from rocks, so that the estimated age is less than the true value.
Search for radiometric dating becomes impossible when:
Furthermore, because his skull was found separated from his body, his body had probably not been buried deep beneath the soil, meaning his body was probably originally put in a shallow grave, near the river.