单词	radiometric
释义	radiometric /ˌreɪdɪə(ʊ)ˈmɛtrɪk / adjective Physics Relating to the measurement of radioactivity: radiometric data... Dumyahn and First measured the three-dimensional emission profile of various types of single lamps by taking radiometric measurements at various points in space. All of these factors are likely to be important in the case of the Besdegirmen rocks, and hence igneous crystallization ages may be greater than measured radiometric ages. Thermal images were taken with a radiometric infrared video camera. Derivatives radiometrically adverb ... Currently, the precise relationship between ammonite zones in the Boreal Province and Late Jurassic radiometrically calibrated sea-floor magnetic reversal history has not been established. Almost all meteorites are collisional fragments of asteroids, and can be dated radiometrically to about 4.6 billion years, which represents the birth of the Solar System. The Cambro-Ordovician boundary is now radiometrically dated at 490 Ma and so only rocks and fossils of late Cambrian age are included in this part of our survey.
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