Geological dating wiki black and white dating websites
Radiometric dating (often called radioactive dating) is a way to find out how old something is.The method compares the amount of a naturally occurring radioactive isotope and its decay products, in samples. It is the main way to learn the age of rocks and other geological features, including the age of the Earth itself.Radiometric dating is also used to date archaeological materials, including ancient artifacts.
The method works best if neither the parent nuclide nor the daughter product enters or leaves the material after its formation.Anything which changes the relative amounts of the two isotopes (original and daughter) must be noted, and avoided if possible.It may be used to date a wide range of natural and man-made materials.Fossils may be dated by taking samples of rocks from above and below the fossil's original position.Plotting an isochron (straight-line graph) is used to solve the age equation graphically.
It shows the age of the sample, and the original composition.