Here are some specific results along this line; many more could be cited.
These were taken from a conference in 2012Fossils, coal, oil, natural gas, limestone, marble, and graphite from every Flood-related rock layer—and even some pre-Flood deposits—have all contained measurable quantities of radiocarbon.
Here are more quotations from the Science article referenced above:, Schweitzer, her postdoc Elena Schroeter, and colleagues report that they did a complete makeover of their 2009 experiment to rule out any possible contamination. Schroeter even went so far as to break down the mass spectrometer piece by piece, soak the whole thing in methanol to remove any possible contaminants, and reassemble the machine. Just how those collagen sequences survived for tens of millions of years is not clear.
“About the only thing that is the same [as the 2009 experiments] is the dinosaur,” Schweitzer says. Meanwhile, Schweitzer’s team is going beyond collagen.
These results were discussed in a recent Mary Schweitzer’s results shows that essentially all the remaining material in the dinosaur bone is original because she had no trouble finding these young appearing proteins.
If there had been contamination, then it would have introduced other substances into the soft tissue.
Recent finds of Mary Schweitzer are also relevant for the dating of ancient bones.
Thus a sample that dates to 40,000 years by C14 dating still has about 7 billion C14 atoms per mole of carbon.With a few important exceptions, living organisms keep all their amino acids in the “L” configuration.When an organism dies, control over the configuration of the amino acids ceases, and the ratio of D to L moves from a value near 0 towards an equilibrium value near 1, a process called racemization.The half-life of C14 is 5730 years, although there are subtleties about how C14 ages are actually computed.That means that in 5730 years, half of the C14 will decay to nitrogen 14.
This is still a large number of C14 atoms, and they had to come from somewhere!