The closed system question is discussed against the background of the growth and structure of the molluscan shells measured. However, the method has some limitations. Radiometric dating method based on the degree to which secular equilibrium has been achieved between the parent U and the daughter Th If you have previously obtained access with your personal account, Please log in. History at your fingertips. Science Radiocarbon
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The uncalibrated age is years. Many prehistoric cavern paintings dating up to 30, years ago, have been investigated using radiocarbon dating, because the materials used are mostly of organic origin. From Wikipedia, the free encyclopedia. U-series dating is a family of methods which can be applied to different materials over different time ranges.