The accepted method of dating rocks is to use radiometric dating. There are several problems with this approach. One is that we don't know the initial composition of the rocks. Were they formed originally with daughter atoms or formed with radioactive atoms that then decayed so that we can measure the daughter atoms and calculate an age? From the creation revolution web page I copied the following comment: "rocks observed to form on a particular date often show radioisotope age estimates far exceeding their actual ages. For example, when the fresh lava dome at Mount St. Helens was only ten years old, it showed a radioisotope age estimate of 340,000 years!2 Many such examples cast doubt on the entire dating method.3"
Read more: http://creationrevolution.com/2013/02/doesnt-radioisotope-dating-prove-rocks-are-millions-of-years-old/#ixzz2M8tdMEHX -