Carbon normally occurs as Carbon-12, but radioactive Carbon-14 may sometimes be formed in the outer atmosphere as Nitrogen-14 undergoes cosmic ray bombardment.
The resulting C-14 is unstable and decays back to N-14 with a measured half-life of approximately 5,730 years.
They said the older age was the age the rocks underwent metamorphism, while the younger age was when the rocks were later heated. No matter what the numbers are, a plausible story can always be invented Using the lead-lead method, a whole-rock sample gave an age of 508 million years.
Thus the ratio of stable C-12 to unstable C-14, which is known in today's open environment, changes over time in an isolated specimen. As long as the tree lives, it absorbs carbon from the atmosphere in the form of carbon dioxide, both C-12 and C-14.
Once the tree dies, it ceases to take in new carbon, and any C-14 present begins to decay.
When the results for a number of rock samples are plotted on a graph and form a straight line, the researcher can calculate an age for the samples.
But Faure warns his readers not to accept the calculated age without question. In their minds, the key is the way the results are . The only way we can know it is a mixing line is if the calculated age is wrong—and the only way one can ‘know’ if an age is right or wrong is to have a pre-existing belief about what the age should be. measured isochron ages of a rock called amphibolite sampled from south-east India.
Surprisingly, these conflicting results do not unsettle mainstream geologists.
They genuinely believe the world is billions of years old, and the conflicting results do not cause them to question their belief.
He gives an example of volcanic lava along the border of Uganda, Zaire and Rwanda, East Africa. Faure says that in this case we should interpret the line, not as an isochron, but a “mixing line”. With the rubidium-strontium method they obtained an age of 481 million years but with samarium-neodymium the age was almost double at 824 million years.
That lava is known to be relatively young, possibly erupted within historical times, yet a rubidium-strontium straight-line isochron gave an age of 773 million years. Did the disagreement cause the researchers to doubt the dating methods? They removed the disagreement by the way they ‘interpreted’ the results.
Thus carbon dating says nothing at all about millions of years, and often lacks accuracy even with historical specimens, denying as it does the truth of the great Flood.
In reality, its measured disequilibrium points to just such a world-altering event, not many years ago.
Furthermore, the assumptions on which it is based and the conditions which must be satisfied are questionable, and in practice, no one trusts it beyond about 3,000 or 4,000 years, and then only if it can be checked by some historical means.