k-ar age dating
71carbon-14 dating — or radiocarbon dating Method of determining the age of once living material, developed by U.S. physicist Willard Libby in 1947. It depends on the decay of the radioactive isotope carbon 14 (radiocarbon) to nitrogen. All living plants and animals… …
72ionium-thorium dating — ▪ physics method of establishing the time of origin of marine sediments according to the amount of ionium and thorium they contain. Because uranium compounds are soluble in seawater, while thorium compounds are quite insoluble, the… …
73Dates and Dating — • In classical Latin even before the time of Christ it was usual for correspondents to indicate when and where their letters were written Catholic Encyclopedia. Kevin Knight. 2006. Dates and Dating Dates and Dating …
74Thermoluminescence dating — Thermoluminescence (TL) dating is the determination by means of measuring the accumulated radiation dose of the time elapsed since material containing crystalline minerals was either heated (lava, ceramics) or exposed to sunlight (sediments). As… …
75Hellenistic Age — In the eastern Mediterranean and the Middle East, the period between the death of Alexander the Great (323 BC) and the conquest of Egypt by Rome (30 BC). Alexander and his successors established Greek monarchies that controlled the area from… …
76List of Men of a Certain Age episodes — The following is a list of episodes from the TNT dramedy Men of a Certain Age. The series premiered on December 7, 2009. The series was renewed for a second season, which debuted on December 6, 2010.[1] As of July 8, 2011 (2011 07… …
77rubidium-strontium dating — /rooh bid ee euhm stron shee euhm, sheuhm, tee euhm/, Geol. a radiometric dating method whereby the ratio of rubidium isotope to strontium in a mineral is used to calculate the age of the mineral, based on the rate of radioactive decay of… …
78radiation-damage dating — ▪ paleontology method of age determination that makes use of the damage to crystals and the radiation from radioactive substances caused by storage of energy in electron traps. In the mineral zircon, for example, radiation damage results in …
79geological dating — noun use of chemical analysis to estimate the age of geological specimens • Syn: ↑dating • Derivationally related forms: ↑date (for: ↑dating) • Hypernyms: ↑chemical analysis, ↑ …
80radiocarbon dating — noun a chemical analysis used to determine the age of organic materials based on their content of the radioisotope carbon 14; believed to be reliable up to 40,000 years • Syn: ↑carbon dating, ↑carbon 14 dating • Hypernyms: ↑dating, ↑geological… …
