Radiocarbon dating is useful for dating dinosaur fossils
Based on the analysis of these samples, scientists estimate that the Earth itself is about 4.5 billion years old.In addition, the oldest known moon rocks are 4.5 billion years old.
Some of the isotopes used for this purpose are uranium-238, uranium-235 and potassium-40, each of which has a half-life of more than a million years.
This is an extraordinary discovery because Carbon-14 has a half-life of only 5,730 years.
As a result, any Carbon-14 in a sample should decay to undetectable levels well under 100,000 years.
By using radiometric dating to determine the age of igneous brackets, researchers can accurately determine the age of the sedimentary layers between them.
Using the basic ideas of bracketing and radiometric dating, researchers have determined the age of rock layers all over the world.