IODP SEDIS - Thesaurus -

C-14/C-12
BT	isotopes
	.radioactive isotopes
	..C-14/C-12
BT	isotopes
	.stable isotopes
	..C-14/C-12
BT	carbon
	.C-14/C-12
RT	C-14
	isotope ratios
	C-12
SN	As of 1993, not to be used for absolute age. This term has multiple hierarchies.