Dating sites htm

Although it sometimes requires taking minute samples of an object, even that damage may be unacceptable for some artifacts.The new method does not involve removing a sample of the object.

Archaeologists study the archaeological record through field surveys and excavations and through the laboratory study of collected materials.Both the conventional and new carbon dating methods can determine the age of objects as far back as 45,000 to 50,000 years, Rowe said.In conventional dating methods, scientists remove a small sample from an object, such as a cloth or bone fragment.Then they treat the sample with a strong acid and a strong base and finally burn the sample in a small glass chamber to produce carbon dioxide gas to analyze its C-14 content.Rowe's new method, called "non-destructive carbon dating," eliminates sampling, the destructive acid-base washes, and burning.

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