Initially, we would expect most of it to come from subducted oceanic plates, which are uranium and thorium poor and maybe lead rich. Updated January This predictability allows the relative abundances of related nuclides to be used as a clock to measure the time from the incorporation of the original nuclides into a material to the present. This is the most common form of uranium. Creationists also often misunderstand it, claiming that the process is inaccurate. Steven S. As far as I know, it's anyone's guess, but I'd appreciate more information on this.
Snelling discusses numerous false ages in the U-Pb system where isochrons are also used.
However, there are lots and lots of dates that are reported but you would not be aware of the problems unless you know how to read the papers, and unless you refer to other papers that deal with the same topic. At successively lower temperature, other minerals begin to crystallize as shown in Figure 3. What do these men have in common? Such a scenario does not answer all of the questions or solve all of the problems that radiometric dating poses for those who believe the Genesis account of Creation and the Flood. Pre-Flood dates would thus have to be discarded. I'm going I'll stay. Earth Optimism Summit.