Radioactive dating is another method of determining the age of, especially, rocks and fossils. It determines the absolute age of the geological materials or fossils.

Is radiometric dating absolute or relative?

Relative age is the age of a rock layer (or the fossils it contains) compared to other layers. It can be determined by looking at the position of rock layers. Absolute age is the numeric age of a layer of rocks or fossils. Absolute age can be determined by using radiometric dating.