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Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
Different methods of radiometric dating can be used to estimate the age of a variety of natural and even man-made materials.
Free 5-day trial Radiometric dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes.
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.
The absolute ages of the rocks have been determined through radiometric dating where possible.
Hence, the geologic time scale provides a calibrated "yardstick" for determining the ages of rocks worldwide through an examination of their fossils.
Scientists can use certain types of fossils referred to as index fossils to assist in relative dating via correlation.He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.Radiometric dating--the process of determining the age of rocks from the decay of their radioactive elements--has been in widespread use for over half a century.Global Boundary Stratotype Sections and Points have been established for the time scale.
This means that many localities around the world were examined for each dated geologic boundary, and the best was selected to be the worldwide "standard reference section." A "golden spike" has been driven at the point that represents the partcular age on the geologic time scale.
However, rocks and other objects in nature do not give off such obvious clues about how long they have been around.