How scientists calibrate the clock of history using ancient, petrified timber
In short: Dr. Henry Michael of the Penn Museum explores the California wilderness to find ancient, preserved tree remnants. This search is vital for refining radiocarbon dating, a process that relies on precise calibration to accurately determine the age of archaeological findings.
To ensure radiocarbon dating remains accurate, researchers must establish a reliable correction factor. Dr. Henry Michael conducts this work by locating ancient, deceased Bristlecone Pine specimens in Northern California. By analyzing the growth rings of these trees, scientists can determine an exact chronological age for the wood.
Once this precise date is established, the sample undergoes the radiocarbon process. Comparing the known age of the tree rings against the results of the radiocarbon test allows researchers to identify and define the necessary correction factors, ultimately improving the precision of dating methods used across archaeology.
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- Summary by Intellect · source: How Old is Old? (1975)
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