Nd  search
USEneodymium
Nd-143/Nd-144  search
USENd-144/Nd-143
Nd-144/Nd-143  search
BTisotopes
 .stable isotopes
 ..Nd-144/Nd-143
BTmetals
 .rare earths
 ..neodymium
 ...Nd-144/Nd-143
UFNd-143/Nd-144
RTisotope ratios
SNThis term has multiple hierarchies.
Nd/Nd  search
RTabsolute age
 isotope ratios
 neodymium
SNIsotopic ratio used for age determination. Added to Thesaurus in 1995.
Nd/Sm  search
USESm/Nd
Nd/Sr  search
SNNot a valid term for GeoRef. See Nd/Nd and Sr/Sr for dating. See neodymium and strontium respectively for isotope ratios for use in other studies. Use specific ratios if known (Note added 1995.).