Carbon dating, or radiocarbon dating, is effective for dating organic materials up to about 50,000 years old. Beyond this age, the concentration of carbon-14, the radioactive isotope used in the method, decreases to the point where it becomes difficult to obtain accurate measurements. Generally, samples older than 50,000 years are considered too old for reliable radiocarbon dating. For dating materials older than this, other methods such as potassium-argon dating or uranium-series dating may be used.
what is the maximum effective age limit for carbon dating
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