Radiometric dating encyclopedia

Fossils may be dated by taking samples of rocks from above and below the fossil's original position.

Radiometric dating is also used to date archaeological materials, including ancient artifacts.

Ages of Rocks in Millions of Years Sometimes different methods used on the same rock produce different ages.

By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change.

Water flow through rocks is important because all parent substances and many daughter substances are water soluble.

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.

It may be used to date a wide range of natural and man-made materials.

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