VALIDITY OF THE RADIOCARBON-DATES BEYOND 35,000 YEARS BP

If we take in account both the different kinds of material used for 14C dating and the old and new methods of sample preparation, it is possible to estimate the reliability of the oldest of all the radiocarbon dates published. It becomes clear that most of them should be considered as minimal ages and in particular those which were obtained by the isotopic enrichment method. Consequently all the radiocarbon ages attributed to the first interstadials of the early Würm may be considered as too young. © 1990.