The fossil record may be incomplete and may never fully completed, but there are still many clues to evolution and how it happens within the fossil record.One way that helps scientists place fossils into the correct era on the Geologic Time Scale is by using radiometric dating.The different methods of radiometric dating are accurate over different timescales, and they are useful for different materials.After one half-life has elapsed, one half of the atoms of the nuclide in question will have decayed into a "daughter" nuclide, or decay product.Different methods of radiometric dating can be used to estimate the age of a variety of natural and even man-made materials.The methods work because radioactive elements are unstable, and they are always trying to move to a more stable state. This process by which an unstable atomic nucleus loses energy by releasing radiation is called radioactive decay.
hich would equate to the age of the sedimentary rock as a unit.
In many cases, the daughter nuclide is radioactive, resulting in a decay chain.
This chain eventually ends with the formation of a stable, nonradioactive daughter nuclide.
So, we rely on radiometric dating to calculate their ages.
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.
As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils.