A very common claim of young earth creationists in trying to reject the evidence for an old earth is to loudly proclaim that radiometric dating methods “makes assumptions” and that these “assumptions” are somehow fatally flawed or not supported by evidence.

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As time goes on, the ratio of the parent to daughter nuclei will change and decrease (as more parent nuclei decay into daughter nuclei, the former decreases and the latter increases).

Measuring this ratio gives us an idea of how long ago the rock formed. Doesn’t this assume that the rocks are closed systems? Radiometric dating and testing for contamination and disturbances On of the great things about many forms of radiometric dating is that they are self-checking.

This means that the while different rocks contain different absolute amounts of the two isotopes, the is same.

At the time of formation for a rock, the isotopes for an element are homogenized and so the composition of a certain isotope is the same in all the minerals in the rock.

Most young earth creationists reject all of these points.

As a scientific skeptics, we ask ourselves: is this really the case?

This serves as strong evidence for the reliability of radiometric dating methods. Those that did the decaying are called parent nuclei.

If you have a rock that contains radioactive isotopes, these will decay over time.

A very important tool in radiometric dating is the so called isochron diagram and it holds the key to refuting the central creationist claims about radiometric dating.