What is tree ring dating


29-Mar-2017 06:21

Calibration is not only done before an analysis but also on analytical results as in the case of radiocarbon dating—an analytical method that identifies the age of a material that once formed part of the biosphere by determining its carbon-14 content and tracing its age by its radioactive decay.

Carbon-14 is a naturally occurring isotope of the element carbon.

Radiocarbon measurements are based on the assumption that atmospheric carbon-14 concentration has remained constant as it was in 1950 and that the half-life of carbon-14 is 5568 years.

Calibration of radiocarbon results is needed to account for changes in the atmospheric concentration of carbon-14 over time.

Dendrochronology is a science of precise dating, by the accurate counting of annual tree growth-rings, which allows dating wooden items to the year.

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The American botanist, Douglas, established the first tree-ring chronology in 1929 with a pine chronology for the south-west of America extending back to 701 AD.

In most tree species in the British Isles a single tree-ring is produced each year and the tree-ring’s width varies in response to environmental factors, particularly rainfall and temperature.



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An introduction to dendrochronology. Dendrochronology is a science of precise dating, by the accurate counting of annual tree growth-rings, which allows dating.… continue reading »


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