The result is that contamination can form good looking isochron data and uniformitarian geologists know it.

isochron dating methods mode viewprofile-25

Isochron dating methods mode viewprofile video

Potassium-Argon When you look at actual isochron plots such as the ones at the above source, there seems to be room for subjectivity.

Some are better than others but there is often room for multiple plot lines.

Given this, when one looks at an isochron plot, how can one really tell where the true isochron line should be?

Sufficient contamination can produce any isochron pattern regardless of the true isochron. This would be equivalent to a negative or future date.

[1] Isochron dating began when scientists recognized difficulties with the assumptions of radiometric dating, especially how much of the daughter products might have been present when the mineral first formed.

Isochron dating has been developed in an attempt to solve such problems.

The advantage of isochron dating as compared to simple radiometric dating techniques is that no assumptions are needed about the initial amount of the daughter nuclide in the radioactive decay sequence.

Indeed, the initial amount of the daughter product can be determined using isochron dating.

If there is a gain or loss of daughter isotope the point moves vertically.