U-238/Pb-206  search
BTisotopes
 .radioactive isotopes
 ..U-238/Pb-206
BTisotopes
 .stable isotopes
 ..U-238/Pb-206
BTmetals
 .lead
 ..U-238/Pb-206
BTmetals
 .actinides
 ..uranium
 ...U-238/Pb-206
RTisotope ratios
SNAs of 1989, for isotopic ratio used in age determination, use U/Pb. This term has multiple hierarchies.