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Jésus : la bataille de l'ADN
Fontugne Michel. In: Quaternaire , vol. By stating, in , the principles of the carbon- 14 dating method, WF Libby reaffirmed the concept of absolute dating and revolutionised Quaternary sciences With the passing of years, as the analytical performances and knowledge in geochemistry and biology increased, the limitations of this method appeared the ages 14C were manifestly too young The principal reason of this drift of the radiocarbon ages is the variation of the concentration in I4C in the atmosphere which depends both on the production of this isotope m the upper atmosphere and on its exchanges between the various carbon tanks on Earth The method remains nevertheless applicable if one can know the variations of the atmospheric content of I4C in the past, it is the principle of the calibration of the radiocarbon ages Various techniques were used to produce these curves of calibrations, which appeared contradictory for the penod between ka A current state of the question is presented. Quaternaire, 15, 3 , , p C'est le but de cet article. Pourquoi faut-il corriger les datations carbone 14? Pour les
Evin Jacques. For several years there has been a certain amount of confusion as to the terminology of archaeological dates. Indeed, some archaeologists use radiocarbon dates B. In the appearance in Radiocarbon of a calibration curve covering the whole of the Holocene, and going even beyond, though without as much precision, allows one now to envisage a way of systematically converting to real time the dates for the whole of the recent archaeology of the Near East. We recall that, fundamentaly, calibrating involved a new way of interpreting the dates. We can discern that for certain periods, the method provides a greater amount of precision, while for others it produces a largely indeterminate chronology, for example in the course of the 10th Millennium B. This means that we must take into account the real length of the diverse cultural phases which have been defined in the Atlas of sites of the Near East.