Carbon dating the age of the earth
This is what archaeologists use to determine the age of humanmade artifacts. The halflife of carbon14 is only 5,730 years, so carbon14 dating is only effective on samples that are less than 50,000 years old.You can learn more about fossils, dinosaurs, radiometric dating and related topics by reading through the links on the next page.Radiometric dating isn't the only method of determining the age of rocks.These layers are like bookends  they give a beginning and an end to the period of time when the sedimentary rock formed.
By using radiometric dating to determine the age of igneous brackets, researchers can accurately determine the age of the sedimentary layers between them.
Some of the isotopes used for this purpose are uranium238, uranium235 and potassium40, each of which has a halflife of more than a million years.
Carbon dating the age of the earth comments 

Carbon dating – 6 days / 66 books / 6000 years
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Dating Sedimentary Rock  How do scientists determine
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Carbon14 dating scientific technology
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Library RadioCarbon Dating Proves a Young Earth
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Age Dating the Earth  Northwest Creation Network
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