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Chapter 6: Problem 3

To what interval of geologic time is radiocarbon dating applicable?

Short Answer

Expert verified
Radiocarbon dating is applicable to an interval of geologic time within the Holocene epoch of the Quaternary period in the Cenozoic era, dating samples up to about 50,000 years old.

Step by step solution

01

Understand radiocarbon dating

Radiocarbon dating is based on the decay of the radioactive isotope carbon-14, which has a half-life of about 5,730 years. This means that it takes 5,730 years for half of the carbon-14 in a sample to decay, and another 5,730 years for half of what remains, and so on. By comparing the amount of carbon-14 present in a sample to the initial amount, we can determine the age of the sample.
02

Analyze the limitations of radiocarbon dating

Despite being a powerful tool for dating organic materials, radiocarbon dating has its limitations. For example, samples with extremely low or high amounts of carbon-14 may lead to inaccurate results. Furthermore, Radiocarbon dating cannot be used for samples older than about 50,000 years. This is because after this point, the amount of carbon-14 is too low to be accurately measured.
03

Determine the interval of geologic time applicable to radiocarbon dating

Geologic time is divided into different intervals, such as eons, eras, periods, epochs, and ages. Given that radiocarbon dating can be applied to samples up to about 50,000 years old, the method is only suitable for dating relatively recent geologic events. This interval falls within the Holocene epoch, which is a subdivision of the Quaternary period, and is part of the Cenozoic era, which began approximately 66 million years ago. To summarize: The interval of geologic time applicable to radiocarbon dating is within the Holocene epoch of the Quaternary period in the Cenozoic era.

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