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Note that, contrary to a popular misconception, carbon dating is not used to date rocks at millions of years old.
In a related article on geologic ages (Ages), we presented a chart with the various geologic eras and their ages.
In a separate article (Radiometric dating), we sketched in some technical detail how these dates are calculated using radiometric dating techniques.
Recall that atoms are the basic building blocks of matter.
Atoms are made up of much smaller particles called protons, neutrons, and electrons.
Scientists use a technique called radiometric dating to estimate the ages of rocks, fossils, and the earth.