How to solve carbon dating problems
The isotopic make-up of original material is important, as is mixing of magma with surrounding material.
Sometimes these are close but other times they are very different.We can see how do deal with this if we take a particular case. For example the amount of Rb in mantle rocks is generally low, i.e. The mantle thus has a low If these two independent dates are the same, we say they are concordant.