The age of a rock can be calculated if its ratio of uranium to lead is known. This is unstable and eventually decays to lead, which is stable.
"Many of these studies will now have to be redone." The U/Pb isotopic dating technique has been critical in dating geologic events more than 100 million years old, including volcanic eruptions, continental movements and mass extinctions."The beauty of this new technique is that we now can analyze samples we previously could not get an accurate date for," Mundil said.Service DHI offers dating of sediment cores by means of the 210Pb method and may assist with sampling in both marine and freshwater systems.The sediment samples must remain totally undisturbed during sampling to obtain the best possible dating.In addition, the results of the sensitivity analysis are reported.The sediment dating may be supplemented with estimations of the content of alga pigments in the depths required.