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If you have any more questions about it don't hesitate to write.
(2.) I just listened to a series of lectures on archaeology put out by John Hopkins Univ.
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.
For object over 4,000 years old the method becomes very unreliable for the following reason: Objects older then 4,000 years run into a problem in that there are few if any known artifacts to be used as the standard.
After all, this what the archeologist guessed in their published books.
Some believe trees are known to be as old as 9,000 years. A lot of people doubt this claim for various good reasons I wont go into here.
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.