| 释义 |
geochronometry
ge·o·chro·nom·e·try G0091200 (jē′ō-krə-nŏm′ĭ-trē)n. Measurement of geologic time, as through isotopic radioactive decay.
ge′o·chron′o·met′ric (-krŏn′ə-mĕt′rĭk) adj.geochronometry
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. |