It really is specially resistant to heating and events that are metamorphic therefore is very beneficial in stones with complex records. Very often this process is used with the K-Ar plus the isochron that is rb-Sr to unravel a brief history of metamorphic stones, because all these techniques reacts differently to metamorphism and heating. For instance, the U-Pb discordia age might supply the chronilogical age of initial formation associated with the stone, whereas the K-Ar technique, which can be specially responsive to argon loss by heating, might supply the chronilogical age of the latest heating occasion.
A good example of A u-pb discordia age is shown in Figure 5.
This example shows a chronilogical age of 3.56 billion years when it comes to earliest rocks yet found in united states, and a chronilogical age of 1.85 billion years when it comes to heating event experience that is latest by these stones. The K-Ar many years on stones and minerals out of this rematch coffee meets bagel area in southwestern Minnesota also record this 1.85-billion-year warming event.