Carbon isotope used radiocarbon dating does work
As the magnetic field decreases, more cosmic radiation penetrates the earths atmosphere and this causes a slow long-term increase in Carbon-14 production.
If one were to believe the Bible, the earth was surrounded by a layer of water vapor between Creation and the Flood.
Carbon-14 decays to a zero amount in 250,000 supposed years after its production.
It is incapable of yielding dates in the millions of years.
The Carbon-14 Dioxide is then utilized by plants during their normal metabolism.
Animals and humans who eat these plants take the Carbon-14 into their systems just as they would Carbon-12 Dioxide.