calcites

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• Calcites basalis — Coucou de Horsfield Coucou de Horsfield …   Wikipédia en Français

• calcite — {{hw}}{{calcite}}{{/hw}}s. f. (mineral.) Carbonato di calcio che cristallizza in cristalli romboedrici; principale costituente dei calcari …   Enciclopedia di italiano

• calcite — calcitic /kal sit ik/, adj. /kal suyt/, n. one of the commonest minerals, calcium carbonate, CaCO3, found in a great variety of crystalline forms: a major constituent of limestone, marble, and chalk; calc spar. [1840 50; CALC + ITE1] * * * Most… …   Universalium

• DOLOMIES — Une dolomie est une roche sédimentaire formée principalement par le minéral dolomite , carbonate double de calcium et de magnésium. Depuis quelques décennies, des dolomies de formation récente ont été décrites dans des milieux variés, presque… …   Encyclopédie Universelle

• Well drilling — Tricone rock bit Well drilling is the process of drilling a hole in the ground for the extraction of a natural resource such as ground water, natural gas, or petroleum. Drilling for the exploration of the nature of the material underground (for… …   Wikipedia

• Antimony — This article is about the element. For the town, see Antimony, Utah. Not to be confused with Antinomy, a type of paradox. tin ← antimony → tellurium As ↑ Sb ↓ Bi …   Wikipedia

• Korean stone art — began as votive art over 3000 years ago, and began to be seen as worthy of scholars a thousand years ago. The art usually works on three scales: large installations of monumental shaped stones as ornamental gates; medium sized shaped stones for… …   Wikipedia

• Roller cone bit — A roller cone bit is a drill bit used for drilling through rock, for example when drilling for oil and gas. [cite book | last = Hyne | first = Norman J. | title = Dictionary of Petroleum Exploration, Drilling Production | publisher = PennWell… …   Wikipedia

• Ikaite — is the mineral name for the hexahydrate of calcium carbonate, CaCO3·6H2O. Ikaite is colorless when pure. DistributionIt is usually considered a rare mineral, but this is likely due to difficulty in preserving samples. It was first discovered in… …   Wikipedia

• South Pars / North Dome Gas-Condensate field — South Pars / North Dome Field …   Wikipedia

• Pseudomorphose — ist ein Begriff aus der Mineralogie. Eine Pseudomorphose ist ein Mineral, das nicht seine typische Eigengestalt (Kristallsystem) zeigt, sondern die äußere Form einer anderen Mineralart angenommen hat. Pseudomorphosen entstehen beispielsweise… …   Deutsch Wikipedia