Why is radiometric dating of sedimentary rocks difficult

why is radiometric dating of sedimentary rocks difficult

These layers are like bookends -- they give a beginning and an end to the period of time when the sedimentary rock formed. Saber-tooth Kittens Were Big-boned.

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This can be achieved by bombarding a sample of known age a 'standard' along with the samples to be measured and comparing the results of the isotope analysis.

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