Dendrochronology and carbon 14 dating

It's development revolutionized archaeology by providing a means of dating deposits independent of artifacts and local stratigraphic sequences. Libby in 1949, and has become an indispensable part of the archaeologist's tool kit since.“The discovery of past spikes in atmospheric radiocarbon activity, caused by major solar energetic particle events, has opened up new possibilities for high-precision chronometry,” the paper said.Academics believe that powerful solar storms caused bursts of radiation that showered down on Earth in 775 to 994 CE.For instance, it is possible to date the wood support of a panel as well as canvas.

Researchers from the University of Oxford, Michael Dee and Benjamin Pope, published their results today in Proceedings of the Royal Society A.Greatly simplified, the process samples living and dead trees in a given area.The tree-ring patterns are matched, and laid down in series, building a continuous timeline of known dates.The two spikes, known as Miyake events, can be detected in the unusually high levels of radioactive carbon-14 in tree-rings that grew over that time period.Carbon-14 - an unstable isotope of carbon - ends up in plant tissue through photosynthesis.Thermoluminescence dating is generally not very accurate.

501

Leave a Reply