One of the impressive points Whitewall makes is the conspicuous absence of dates between 4,500 and 5,000 years ago illustrating a great catastrophe killing off plant and animal life world wide (the flood of Noah)!
Once they did that they developed the overall sequence.Despite this she continually uses the c14 dates to create 'absolute' chronologies.She says this is ok so long as you take into account the correction factors from dendrochronology.Example: wood found in a grave of known age by historically reliable documents is the standard for that time for the C14 content.This standard content of C14 can then be used for wood not associated with a historically documented date.Libby, the discoverer of the C14 dating method, was very disappointed with this problem.He understood that archaeological artifacts were readily available.And this big sequence is then used to 'correct' C14 dates. (3.) Even if the rate of decay is constant, without a knowledge of the exact ratio of C12 to C14 in the initial sample, the dating technique is still subject to question.(4.) Traditional 14C testing assumes equilibrium in the rate of formation and the rate of decay.Radiocarbon present in molecules of atmospheric carbon dioxide enters the biological carbon cycle: it is absorbed from the air by green plants and then passed on to animals through the food chain.Radiocarbon decays slowly in a living organism, and the amount lost is continually replenished as long as the organism takes in air or food.