lead age determination method

См. также в других словарях:

• lead-210 dating — Method of dating that makes use of the ratio of the amount of the radioactive isotope lead 210 to that of the stable isotope lead 206. The method has been applied to the ores of uranium. Lead 210 dating is particularly useful for determining the… …   Universalium

• Islamic Golden Age — The Islamic Golden Age, also sometimes known as the Islamic Renaissance, [Joel L. Kraemer (1992), Humanism in the Renaissance of Islam , p. 1 148, Brill Publishers, ISBN 9004072594.] was traditionally dated from the 8th century to the 13th… …   Wikipedia

• Scientific method — …   Wikipedia

• History of scientific method — The history of scientific method is inseparable from the history of science itself. The development and elaboration of rules for scientific reasoning and investigation has not been straightforward; scientific method has been the subject of… …   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

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• 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

• geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …   Universalium

• Geochronology — A schematic depiction of the major events in the history of our planet. Geochronology is the science of determining the age of rocks, fossils, and sediments, within a certain degree of uncertainty inherent to the method used. A variety of dating… …   Wikipedia

• geochronology — geochronologic /jee oh kron l oj ik/, geochronological, adj. geochronologist, n. /jee oh kreuh nol euh jee/, n. the chronology of the earth, as based on both absolute and relative methods of age determination. [1890 95; GEO + CHRONOLOGY] * * *… …   Universalium

• Toy safety — Magnetix, a popular construction toy selling over 3.8 million units, was recalled after injuries and a fatality when magnets came loose. Toy safety is the practice of ensuring that toys, especially those made for children, are safe, usually… …   Wikipedia