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We can absolute date materials but it will always have an uncertainty range, we can never know the age with infinite precision.Relative dating is like looking at a multi-layered cake.Relative dating is used commonly when looking at the relative order of geological events.What can complicate relative dating is when the strata is not the right way up!This problem is now reduced by the careful collection of samples, rigorous crosschecking and the use of newer techniques that can date minute samples.Volcanic rocks – such as tuff and basalt – can be used in dating because they are formed at a particular moment in time, during an eruption.

Relative dating and radiometric dating are used to determine age of fossils and geologic features, but with different methods.

Before radiometric dating (or other methods of absolute dating like counting tree rings) it was difficult to determine the actual age of an object.

Radiometric dating, based on known rates of decay of radioactive isotopes in objects, allows a specific age of an object to be determined to some degree of accuracy.

An absolute age is one determined usually by mass-spectrometry where an isotope is measured and then an age can be calculated (a very very basic explanation).

So in the end you can say this fossil is 50 thousand years old (always with an associated uncertainty).




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