rubidium-strontium dating

[ roo-bid-ee-uh m-stron-shee-uh m, -shuh m, -tee-uh m ]
/ ruˈbɪd i əmˈstrɒn ʃi əm, -ʃəm, -ti əm /

noun Geology.

a radiometric dating method whereby the ratio of rubidium isotope to strontium in a mineral is used to calculate the age of the mineral, based on the rate of radioactive decay of rubidium to strontium.

Nearby words

  1. rubescent,
  2. rubiaceous,
  3. rubicon,
  4. rubicund,
  5. rubidium,
  6. rubied,
  7. rubify,
  8. rubiginous,
  9. rubik cube,
  10. rubik's cube

Origin of rubidium-strontium dating

First recorded in 1965–70

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


British Dictionary definitions for rubidium-strontium dating

rubidium-strontium dating

noun

a technique for determining the age of minerals based on the occurrence in natural rubidium of a fixed amount of the radioisotope 87 Rb which decays to the stable strontium isotope 87 Sr with a half-life of 4.7 × 10 11 years. Measurement of the ratio of these isotopes thus gives the age of a mineral, for ages of up to about 4 × 10 9 years
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012