Radiometric dating method definition

22 Jan

All radiometric dating methods measure isotopes in some way.

Most directly measure the amount of isotopes in rocks, using a mass spectrometer.

However, there are radiometric dating methods that can be used on sedimentary rock, including luminescence dating.

These rates of decay are known, so if you can measure the proportion of parent and daughter isotopes in rocks now, you can calculate when the rocks were formed.

Because of their unique decay rates, different elements are used for dating different age ranges.

Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson. As we age, our hair turns gray, our skin wrinkles and our gait slows.

However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.