Free nudecams - Who developed the radiocarbon dating method
Since limestone contains very little, if any, radiocarbon, clam shells will contain less radiocarbon than would have been the case if they had gotten their carbon atoms from the air.This gives the clam shell an artificially old radiocarbon age.
However, the reason for this is understood and the problem is restricted to only a few special cases, of which freshwater clams are the best-known example.
It is not correct to state or imply from this evidence that the radiocarbon dating technique is thus shown to be generally invalid.
Together, the methods contribute to the production of a timescale for events throughout the Quaternary, whether they cover a few million years or a few decades.
These methods are briefly summarized in terms of their initial inception and key advances in technique development, and they are illustrated by a limited number of applications.
Comparison of ancient, historically dated artifacts (from Egypt, for example) with their radiocarbon dates has revealed that radiocarbon years and calendar years are not the same even for the last 5,000 calendar years.
Since no reliable historically dated artifacts exist which are older than 5,000 years, it has not been possible to determine the relationship of radiocarbon years to calendar years for objects which yield dates of tens of thousands of radiocarbon years.
It subsequently evolved into the most powerful method of dating late Pleistocene and Holocene artifacts and geologic events up to about 50,000 years in age.
The radiocarbon method is applied in many different scientific fields, including archeology, geology, oceanography, hydrology, atmospheric science, and paleoclimatology.
The problem with freshwater clams arises because these organisms derive the carbon atoms which they use to build their shells from the water in their environment.
If this water is in contact with significant quantities of limestone, it will contain many carbon atoms from dissolved limestone.
Some organic materials do give radiocarbon ages in excess of 50,000 "radiocarbon years." However, it is important to distinguish between "radiocarbon years" and calendar years.Tags: Adult Dating, affair dating, sex dating