- lead-lead dating
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определение возраста с помощью изотопов свинца
English-Russian dictionary of geology. 2011.
lead-lead dating
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Lead-lead dating — is a method for dating geological samples, normally based on whole rock samples of material such as granite. For most dating requirements it has been superseded by uranium lead dating (U Pb dating), but in certain specialized situations (such as… … Wikipedia
Uranium-lead dating — Uranium lead is one of the oldest and most refined radiometric dating schemes, with a routine age range of about 1 million years to over 4.5 billion years, and with routine precisions in the 0.1 1 percent range. [Parrish, Randall R.; Noble,… … Wikipedia
uranium-lead dating — noun (geology) A method of determining the age in years of geological material, based on the known decay rate of uranium isotopes to lead isotopes • • • Main Entry: ↑uranium … Useful english dictionary
uranium-thorium-lead dating — or common lead dating Method of dating very old rocks by means of the amount of common lead they contain. Common lead is any lead from a rock or mineral that contains a large amount of lead and a small amount of the radioactive precursors of lead … Universalium
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
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
lead — lead1 /leed/, v., led, leading, n., adj. v.t. 1. to go before or with to show the way; conduct or escort: to lead a group on a cross country hike. 2. to conduct by holding and guiding: to lead a horse by a rope. 3. to influence or induce; cause:… … Universalium
Dating methodology (archaeology) — Dating material drawn from the archaeological record can 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
Lead — (pronEng|ˈlɛd) is a main group element with a symbol Pb ( la. plumbum). Lead has the atomic number 82. Lead is a soft, malleable poor metal, also considered to be one of the heavy metals. Lead has a bluish white color when freshly cut, but… … Wikipedia
Dating (activity) — Dating is any social activity performed as a pair or even a group with the aim of each assessing the other s suitability as their partner in an intimate relationship or as a spouse. The word refers to the act of agreeing on a time and date when a … Wikipedia
Dating The Enemy — est un film australien réalisé par Megan Simpson Huberman en 1996. Sommaire 1 Synopsis 2 Fiche technique 3 Distribution 4 Récompenses … Wikipédia en Français
