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Universalium. 2010.
Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… … Wikipedia
radiometric dating — radiometrinis datavimas statusas T sritis chemija apibrėžtis Mineralinių objektų amžiaus nustatymas pagal radionuklido suskilimo laipsnį arba jo produktų santykį. atitikmenys: angl. radioactive dating; radiometric dating rus. изотопное… … Chemijos terminų aiškinamasis žodynas
radiometric dating — any method of determining the age of earth materials or objects of organic origin based on measurement of either short lived radioactive elements or the amount of a long lived radioactive element plus its decay product. Also called radioactive… … Useful english dictionary
radiometric dating — ra′diomet′ric dat′ing n. gel phs ara any method of determining the age of earth materials or objects of organic origin based on measurement of either short lived radioactive elements or the amount of a long lived radioactive element plus its… … From formal English to slang
radiometric dating — /ˌreɪdioʊˌmɛtrɪk ˈdeɪtɪŋ/ (say .raydeeoh.metrik dayting) noun determining the age of a rock or mineral by measuring the ratios of certain radioactive isotopes contained in the specimen …
Dating methodologies in archaeology — Dating material drawn from the archaeological record can be made by a direct study of an artifact or may be deduced by association with materials found in the context the item is drawn from or inferred by its point of discovery in the sequence… … Wikipedia
radiometric — (adj.) 1877, from radio , here indicating RADIANT (Cf. radiant) energy, + metric (see METRY (Cf. metry)). Radiometric dating attested from 1906 … Etymology dictionary
dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or … Universalium
radiometric — adj. of or relating to the measurement of radioactivity. Phrases and idioms: radiometric dating a method of dating geological specimens by determining the relative proportions of the isotopes of a radioactive element present in a sample … Useful english dictionary
Isochron dating — is a common technique of radiometric dating and is applied to date certain events, such as crystallization, metamorphism, shock events, and differentiation of precursor melts, in the history of rocks. Isochron dating can be further separated into … Wikipedia
