IODP SEDIS - Thesaurus -

U-238/Pb-206
BT	isotopes
	.radioactive isotopes
	..U-238/Pb-206
BT	isotopes
	.stable isotopes
	..U-238/Pb-206
BT	metals
	.lead
	..U-238/Pb-206
BT	metals
	.actinides
	..uranium
	...U-238/Pb-206
RT	isotope ratios
SN	As of 1989, for isotopic ratio used in age determination, use U/Pb. This term has multiple hierarchies.