Radiometric dating uranium 238

Because its half-life is so long it is useful for dating the.

It can be used to date rocks that formed and crystallised from about 1 million years to over billion years ago with routine precisions in the 1 percent range.The long half-life of uranium-238 makes it possible to date only the oldest rocks.Through decay Uranium-238 turns into stable Lead-206.Uranium dating (uranium-lead) is good for the entire history of the Earth since U-238 (the parent) has a half-life of billion years.If a rock has a uranium to lead ratio of 1:1, one half-life must have passed since it formed.

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