Relative dating methods and absolute dating methods
But really, how do scientists figure out how old their dinosaur bones are?
And, what about other findings like fossil fish, plants and insects?
Instead, other methods are used to work out a fossil’s age.
Stratigraphic dating is based on the principle of depositional superposition of layers of sediments called strata.
Knowing when a dinosaur or other animal lived is important because it helps us place them on the evolutionary family tree.
Accurate dates also allow us to create sequences of evolutionary change and work out when species appeared or became extinct. These are: Where possible, several different methods are used and each method is repeated to confirm the results obtained and improve accuracy.
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.