geochronometry

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geochronometry

[¦jē·ō·krə′näm·ə·trē]
(geology)
The study of the absolute age of the rocks of the earth based on the radioactive decay of isotopes, such as 238U,235U,232Th,87Rb,40K, and 14C, present in minerals and rocks.
References in periodicals archive ?
39]Ar mica be done with caution as cooling rate is an important factor to consider and one which is difficult to assess in the absence of higher temperature geochronometric data.