Radiometric dating using isotopes
For years, creation researchers have published ample data to refute the assumed reliability of nuclear decay clocks in general, as well as specifically for Lead.For example, in 1979, John Woodmorappe catalogued scores of discordant dates “determined” by isotope decay systems, all published in secular literature.Levels of carbon-14 become difficult to measure and compare after about 50,000 years (between 8 and 9 half lives; where 1% of the original carbon-14 would remain undecayed).
In 2005, sedimentologist Steve Austin performed a test of the lead-lead isotope clock assumptions in earth material, and found data that nullified the idea that the decay rate has been constant.
This age was based on the belief that the rate of decay has been constant, and that Uranium 238 will be present in a known ratio to Uranium 235.
The varying quantities of these isotopes call into question the calculated age of the solar system, since “one of the equation’s assumptions — that certain kinds of uranium always appear in the same relative quantities in meteorites — is wrong.” CAIs are “calcium-aluminum-rich inclusions” found in the meteorite.
Carbon dating is used to determine the age of biological artifacts up to 50,000 years old.
This technique is widely used on recent artifacts, but educators and students alike should note that this technique will not work on older fossils (like those of the dinosaurs alleged to be millions of years old).