absolute age determination

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• determination — noun 1 will to continue ADJECTIVE ▪ dogged, fierce, great, grim, gritty (esp. BrE), ruthless, single minded, steely, strong, stubborn …   Collocations dictionary

• Age of Liberty — The Age of Liberty ( sv. Frihetstiden) is the half a century long experiment with a parliamentary system and increasing Civil Rights in the period from Charles XII s death in 1718 to Gustav III s coup d état in 1772. The shift of power from the… …   Wikipedia

• 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

• Mesopotamia, history of — ▪ historical region, Asia Introduction  history of the region in southwestern Asia where the world s earliest civilization developed. The name comes from a Greek word meaning “between rivers,” referring to the land between the Tigris and… …   Universalium

• 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

• 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

• 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

• Geologic time scale — This clock representation shows some of the major units of geological time and definitive events of Earth history. The Hadean eon represents the time before fossil record of life on Earth; its upper boundary is now regarded as 4.0 Ga.[1] Other… …   Wikipedia

• Human Era — Holocene era redirects here. For the geological epoch, see Holocene. The Human Era, also known as the Holocene calendar or Holocene era (HE), is a year numbering system that adds exactly 10,000 years to the currently world dominant Anno Domini… …   Wikipedia

• Radiocarbon dating — (sometimes simply known as carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon 14 (14C) to estimate the age of carbon bearing materials up to about 58,000 to 62,000 years.[1] Raw, i.e. uncalibrated …   Wikipedia

• Obsidian hydration dating — (OHD) is a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian. Obsidian is a volcanic glass that was sometimes used as a raw material in the manufacture of stone tools such as projectile… …   Wikipedia