Dating is a technique used in archeology to ascertain the age of artifacts, fossils and other items considered to be valuable by archeologists.
There are many methods employed by these scientists, interested in the old, to get to know the age of items.
Free 5-day trial You may already know how to date a fossil with a rock.
But did you know that we can also date a rock with a fossil?
Instead, other methods are used to work out a fossil’s age.
These include radiometric dating of volcanic layers above or below the fossils or by comparisons to similar rocks and fossils of known ages.
Watch this video to find out how we use index fossils to establish the relative ages of rocks.
Index fossils are fossils that are known to only occur within a very specific age range.We talked about relative dating of rocks and how scientists use stratigraphic succession to compare the ages of different rock layers.You should already understand that the lower rock strata are generally older than the strata found higher up in the rock.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.It is possible to tell the number of years ago a particular rock or archeological site had been formed.