Radiometric dating uranium 235

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Of course C-14 would never be of any use for dating dinosaur bearing deposits, unless you want everything to date to around 40,000 years!

Radio-Carbon dating can be used for dates up to ~80,000 years ago.

The practical range for dating is in the order of a few hundred to about 40,000 years BP.

Here are the half-lives of some other radioactive elements: These are said to be used in dating techniques of gas formation light emission called thermoluminescence).

Besides thermoluminescence there is also the measurement of the ratio of the radioactive material to its decay elements.

However, the error range increases drastically once you pass 50,000 years.

Also, it is of little use in anything more recent than 5,000 years ago.

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