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absolute age  search
UFabsolute dating
 actual age (absolute age)
RTaccelerator mass spectroscopy
 age
 Ar/Ar
 C-14
 charcoal
 cosmochronology
 dates
 diffusion
 geochemistry
 geochronology
 He-4/He-3
 He/He
 horns
 I/Xe
 Io/Th
 Io/U
 isochrons
 isotopes
 K/Ar
 Kr/Kr
 Lu/Hf
 Nd/Nd
 new methods
 orogeny
 overprinting
 Pb-210
 Pb/Pb
 Pb/Th
 radioactiv
SNUsed for isotopic (radiometric or radiogenic) dating. For non-isotopic dating, see geochronology. When age is determined, the term dates is indexed with material type, isotopic dating methods and the age found. Indexed with dates or specific methods if ap
absolute age, dates  search
SNFor specific dates, see absolute age and dates.
absolute age, methods  search
SNNot a valid GeoRef index term after 1971. Used in subfiles E, G, N, T and B.