Why is carbon dating NOT useful for dating fossils from millions of years ago?

C14 decays slowly
C14 decays slowly

C14 decays too quickly
C14 decays too quickly

C14 decays slower than uranium
C14 decays slower than uranium

C14 does not deacy at all
C14 does not deacy at all

3 answers

The correct answer is: "C14 decays too quickly".

Carbon dating is based on the decay of radioactive carbon-14 (C14) in an organic material. The half-life of C14 is around 5700 years, which means that after that time, half of the original amount of C14 will have decayed into nitrogen-14. This process continues over time, with the remaining C14 gradually decaying into nitrogen-14.

However, C14 has a relatively short half-life compared to the actual age of most fossils, which are millions of years old. After a certain point, there is so little C14 left in the fossil that it becomes impossible to accurately measure its remaining concentration. This is why carbon dating is not useful for dating fossils from millions of years ago. Instead, other methods, such as uranium-lead dating, potassium-argon dating or argon-argon dating, must be used.
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