Creation Science

Young Earth Creation Science Argument Index


G1241:  Isochron dating gives unreliable results


Edited by Greg Neyman



Isochron dating is unreliable. The method assumes that the samples are cogenetic, that is, that they form at the same time from a reasonably homogeneous common pool. This assumption is invalid. In particular, mixing two sources with different isotopic compositions gives meaningless but apparently valid isochron plots.

Source:   Overn, William, n.d. Isochron rock dating is fatally flawed.




  1. Mixing can usually be detected by plotting the total daughter isotopes against the ratio of daughter isotopes. These would not likely fall on a straight line if mixing occurred.

  2. Isochron plots from mixing can have any slope, even negative slopes. If mixing were common, we would expect a high percentage of isochron results to show negative slopes. They do not.

  3. Other factors can produce false isochrons, and geologists are aware of these limitations and can take steps to avoid them

  4. False isochrons can be avoided by choosing appropriate samples


For more Reading:

Talk Origins source article

Isochron Dating



     If you are not a Christian, and you have been holding out on making a decision for Christ because the Church always preached a message that was contrary to what you saw in the scientific world, then rest assured that the Bible is the inerrant Word of God, and you can believe in Christ and receive salvation, while still believing in an old earth.  Click here for more.


    Are you a Christian who believes in young earth creationism?  Now that we have shown the many difficulties of the young earth creation science model in this and many other articles, how does this impact your Christian life?  If you are a young earth creationism believer, click here.




Young Earth Creation Science Argument Index


Related Articles

Radiometric Dating Articles


To learn more about old earth creationism, see Old Earth Belief, or check out the article Can You Be A Christian and Believe in an Old Earth?  

 Feel free to check out more of this website.  Our goal is to provide rebuttals to the bad science behind young earth creationism, and honor God by properly presenting His creation.