English

Noun

rubidium-strontium ‎(uncountable)

1. (attributive) Designating a method of geological dating based on the relative amounts in rock of rubidium-87 and its beta-decay product, strontium-87.
   • 1999, Jonathan I Lunine, Earth: Evolution of a Habitable World, p. 101:

     Isotopic dating of meteorites using the rubidium-strontium system and others indicates that the most primitive rocks in the solar system are 4.56 billion years old, determined rather precisely.

Synonyms

• Rb-Sr