Who are Creationists?
Recently I was taken to task by our treasurer concerning the following argument I wrote in my book: Creationists have questioned the validity of isotopic dating. They point out that some of the underlying assumptions are not met in nature and question the accuracy of measuring half-lives. While there is no doubt that some uncertainty exists in isotopic dating, the schemes are entirely workable. Geologists accept the results of isotopic dating for a number of reasons. First, the results are scientifically reproducible. One can repeatedly obtain the same age for a rock sample within experimental error. Second, isotopic dating schemes can serve as cross-checks on each other. For example, one can use two different dating schemes on the same rock and obtain the same age within experimental error. Finally, isotopic dates do not conflict with relative-age dating techniques. An igneous intrusion cutting across another igneous rock body must be younger than that rock body. This is confirmed by
