However, research by creationists has revealed a large number of problems with radiometric dating.
In some cases such as Carbon-14 dating, radioactive dating actually gives strong evidence for a young Earth, while other methods such as K-Ar dating and Isochron dating are based on faulty assumptions and are so unreliable as to be useless.
The slope of the line equals the number of half-lives the parent isotope has passed since solidification.
U has a known rate, and as such the number of tracks is theoretically related to the age of the sample.
Because fission-track dating requires a manual count of the fission tracks, the process is more prone to human error and bias than other radiometric dating methods.
It is further theorized that since all isotopes of the same element are chemically identical, they should be removed in proportional amounts, forming a straight line on the concordia diagram, that crosses the concordia curve at both the crystallization and the contamination date.
Loss of uranium moves the point up and to the right, while a loss of lead moves the point down and to the left.
Creation science is one theoretical system and evolution is another.