Fossils and carbon dating
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.
Ancient protein specialist Michael Collins noted, “Proteins decay in an orderly fashion. This shows that there are many such finds of protein in fossil specimens, and also that experts in the field have trouble seeing how proteins could survive in bone for millions of years.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.This is still a large number of C14 atoms, and they had to come from somewhere!
In general, organic matter in the fossil record dates by C14 dating to 20,000 to 40,000 years.
In 20,000 years the concentration of C14 decreases by a factor of 0.089 (to less than a tenth) because (1/2) or about 7 billion C14 atoms in a mole of C12.