potassium-argon dating

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(Physics / General Physics) a technique for determining the age of minerals based on the occurrence in natural potassium of a small fixed amount of radioisotope ⁴⁰K that decays to the stable argon isotope ⁴⁰Ar with a half-life of 1.28 ✕ 10⁹ years. Measurement of the ratio of these isotopes thus gives the age of the mineral Compare radiocarbon dating, rubidium-strontium dating

potassium-argon dating

A method of radiometric dating, involving analysis of the ratio of potassium 40 (a radioactive isotope of potassium) to argon (the product of radioactive decay of potassium 40) in a given sample.

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Noun

potassium-argon dating - geological dating that relies on the proportions of radioactive potassium in a rock sample and its decay product, argon

dating, geological dating - use of chemical analysis to estimate the age of geological specimens

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dating geological dating radiometric dating			Geophysicist Michael McWilliams of Stanford University dated the Brunhes-Matuyama transition at 780,000 years ago using the argon-argon technique, a variation of the standard potassium-argon dating method. New date resets geologic clocks by Monastersky, Richard / Science News Potassium-argon dating of the volcanic rocks puts the islands' ages between about 1 million (western islands) and 4 million (eastern islands) years. Gauge the Galapagos with a younger age by Science News			potassium acid carbonate potassium alum potassium bicarbonate potassium bitartrate potassium bromide potassium carbonate Potassium carboxide potassium chlorate potassium chloride potassium cyanide potassium dichromate potassium feldspar potassium ferricyanide potassium ferrocyanide potassium hydrogen carbonate potassium hydrogen tartrate potassium hydroxide potassium iodide potassium muriate potassium nitrate potassium permanganate potassium sodium tartrate potassium sulfate potassium sulphate potassium-argon potassium-argon dating Potassoxyl potation potations potato potato bean potato beetle potato blight potato bread potato bug potato chip potato chips potato crisp potato crisps potato disease potato family potato fern potato flour Potato fly potato fungus potato mildew potato mold potato mosaic potato moth potato murrain potato nose			Potassium sulphate Potassium sulphate Potassium sulphide Potassium t-butoxide Potassium t-butoxide Potassium t-butoxide Potassium tert-butoxide potassium tetraiodocadmate Potassium thiocyanate Potassium Thiocyanide Potassium Thiocyanide Potassium Thiocyanide Potassium Titanate Whisker Potassium titanyl phosphate potassium titanyl phosphate laser potassium titanyl phosphate laser potassium titanyl phosphate laser Potassium Tri-Polyphosphate potassium undecylenate Potassium valerate Potassium valerate potassium xanthate Potassium, K potassium-40 potassium-40 potassium-42 potassium-42 potassium-43 Potassium-aggravated myotonia potassium-argon potassium-argon dating Potassium-Binding Benzofuran Isophtalate Potassium-Chloride Cotransporter 3 potassium-losing nephritis potassium-losing nephritis potassium-losing nephritis potassium-losing nephropathy potassium-losing nephropathy potassium-losing nephropathy Potassium-Magnesium Sulfate potassium-retaining d's potassium-retaining d's potassium-retaining d's Potassium-retaining diuretic Potassium-retaining diuretics Potassium-Rougier Potassium-Rougier Potassium-sparing potassium-sparing d potassium-sparing d potassium-sparing d Potassium-sparing diuretic Potassium-sparing diuretics Potassium-sparing diuretics Potassium-sparing diuretics Potassoxyl potation potation potations potations potato

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