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Stratigraphy is the oldest of the relative dating methods that archaeologists use to date things.
Stratigraphy is based on the law of superposition--like a layer cake, the lowest layers must have been formed first.
Korff predicted that the reaction between these neutrons and nitrogen-14, which predominates in the atmosphere, would produce carbon-14, also called radiocarbon.
Libby cleverly realized that carbon-14 in the atmosphere would find its way into living matter, which would thus be tagged with the radioactive isotope.
A number of methods are used, all of which have their advantages, limitations and level of accuracy.
Complex dating problems often use a variety of techniques and information to arrive at the best answer.
Artifacts, ecofacts, and features say little themselves, but researchers can make meaningful inferences about these when they are studied closely and in detail.
This applies the geological principle that under normal circumstances younger layers of sediment will be deposited on top of older layers.
Known as radiocarbon dating, this method provides objective age estimates for carbon-based objects that originated from living organisms.
The “radiocarbon revolution” made possible by Libby’s discovery greatly benefitted the fields of archaeology and geology by allowing practitioners to develop more precise historical chronologies across geography and cultures.
Dedicated at the University of Chicago on October 10, 2016.
In 1946, Willard Libby proposed an innovative method for dating organic materials by measuring their content of carbon-14, a newly discovered radioactive isotope of carbon.
For example, JJA Worsaae used this law to prove the Three Age System.