Chronological methods 8 radiocarbon dating

The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen.The resulting radiocarbon combines with atmospheric oxygen to form radioactive carbon dioxide, which is incorporated into plants by photosynthesis; animals then acquire in a sample from a dead plant or animal such as a piece of wood or a fragment of bone provides information that can be used to calculate when the animal or plant died.That means that the play was without fail written after (in Latin, post) 1587.The same inductive mechanism is applied in archaeology, geology and paleontology, by many ways.In this relative dating method, Latin terms ante quem and post quem are usually used to indicate both the oldest and the most recent possible moments when an event occurred or an artifact was left in a stratum.But this method is also useful in many other disciplines.Several dating methods exist, depending on different criteria and techniques, and some very well known examples of disciplines using such techniques are, for example, history, archaeology, geology, paleontology, astronomy and even forensic science, since in the latter it is sometimes necessary to investigate the moment in the past in which the death of a cadaver occurred.Relative dating methods are unable to determine the absolute age of an object or event, but can determine the impossibility of a particular event happening before or after another event of which the absolute date is well known.

The resulting data, in the form of a calibration curve, is now used to convert a given measurement of radiocarbon in a sample into an estimate of the sample's calendar age.

Libby’s discoveries gave immediate support and even vindication to three independent conclusions of my research into natural events of the past, as described in Worlds in Collision and Earth in Upheaval—the time the Ice Age ended, the time petroleum was deposited, and the time of the classical period of Meso-american civilization.

However, the main interest for me in radiocarbon tests was in checking on historical dates of the ancient East, of the period covered in Ages in Chaos.

We have attempted to test the reliability of chronologies of 11 southern Iberian Middle and early Upper Paleolithic sites.

Only two, Jarama VI and Zafarraya, were found to contain material that could be reliably dated.

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