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Radiocarbon dating has an upward limit of 50,000 years because of the half-life of carbon-14, which is about 5,730 years. After this time, there is very little carbon-14 left to measure accurately. Beyond 50,000 years, other radiometric dating methods, such as uranium-lead dating, are used to determine the age of geological samples.

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Q: What statement describes why the radiocarbon dating has a upward limit of 50000 years?
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