limestone


limestone
/luym"stohn'/, n.
a sedimentary rock consisting predominantly of calcium carbonate, varieties of which are formed from the skeletons of marine microorganisms and coral: used as a building stone and in the manufacture of lime. Cf. marble.
[1515-25; LIME1 + STONE]

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Sedimentary rock composed mainly of calcium carbonate (CaCO3), usually in the form of calcite and, less commonly, aragonite.

It may contain considerable amounts of magnesium carbonate (dolomite) as well. Most limestones have a granular texture; in many cases, the grains are tiny fragments of fossil animal shells. Much knowledge of the Earth's history has been derived from the study of fossils embedded in limestone and other carbonate rocks. Limestone is used as a soil conditioner, in the manufacture of glass, and in agriculture. Ornamental varieties are used for flooring, exterior and interior facings of buildings, and monuments.

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rock
      sedimentary rock composed mainly of calcium carbonate (CaCO3), usually in the form of calcite or aragonite. It may contain considerable amounts of magnesium carbonate (dolomite) as well; minor constituents also commonly present include clay, iron carbonate, feldspar, pyrite, and quartz.

      Most limestones have a granular texture. Their constituent grains range in size from 0.001 mm (0.00004 inch) to visible particles. In many cases, the grains are microscopic fragments of fossil animal shells.

      Limestone has two origins: (1) biogenic precipitation from seawater, the primary agents being lime-secreting organisms and foraminifera; and (2) mechanical transport and deposition of preexisting limestones, forming clastic deposits. Travertine, tufa, caliche, chalk, sparite, and micrite are all varieties of limestone.

      Limestone has long fascinated earth scientists because of its rich fossil content. Much knowledge of the Earth's chronology and development has been derived from the study of fossils embedded in limestone and other carbonate rocks. Limestone also has considerable commercial importance. Limestones enriched in phosphate by the chemical action of ocean waters constitute a principal source of raw materials for the fertilizer industry. When heated to temperatures of 900° to 1,000° C (1,650° to 1,800° F), limestones will dissociate calcium carbonate and yield carbon dioxide and lime, the latter having major applications in the manufacture of glass and in agriculture. Certain varieties of limestone also serve as a building stone; they are widely used for flooring, exterior and interior facings, and monuments.

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Universalium. 2010.

Look at other dictionaries:

  • Limestone — (engl. für Kalkstein) ist der Name mehrerer Orte in den Vereinigten Staaten: Limestone (Illinois) Limestone (Maine) und die Limestone Loring Air Force Base (IATA Code LIZ) Limestone (New York) Limestone (Kentucky) früherer Name von Maysville… …   Deutsch Wikipedia

  • Limestone — Limestone, NY U.S. village in New York Population (2000): 411 Housing Units (2000): 188 Land area (2000): 1.628996 sq. miles (4.219080 sq. km) Water area (2000): 0.013843 sq. miles (0.035852 sq. km) Total area (2000): 1.642839 sq. miles (4.254932 …   StarDict's U.S. Gazetteer Places

  • Limestone B&B — (Marmora,Канада) Категория отеля: Адрес: 47 Forsyth Street, K0K 2M0 Marmora, Канада …   Каталог отелей

  • Limestone — Lime stone (l[imac]m st[=o]n ), n. A rock consisting chiefly of calcium carbonate or carbonate of lime. It sometimes contains also magnesium carbonate, and is then called magnesian or dolomitic limestone. Crystalline limestone is called marble.… …   The Collaborative International Dictionary of English

  • Limestone, ME — U.S. Census Designated Place in Maine Population (2000): 1453 Housing Units (2000): 495 Land area (2000): 2.608670 sq. miles (6.756425 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 2.608670 sq. miles (6.756425 …   StarDict's U.S. Gazetteer Places

  • Limestone, NY — U.S. village in New York Population (2000): 411 Housing Units (2000): 188 Land area (2000): 1.628996 sq. miles (4.219080 sq. km) Water area (2000): 0.013843 sq. miles (0.035852 sq. km) Total area (2000): 1.642839 sq. miles (4.254932 sq. km) FIPS… …   StarDict's U.S. Gazetteer Places

  • Limestone, OK — U.S. Census Designated Place in Oklahoma Population (2000): 745 Housing Units (2000): 258 Land area (2000): 3.154987 sq. miles (8.171378 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 3.154987 sq. miles… …   StarDict's U.S. Gazetteer Places

  • Limestone — (spr. Leimstohn, d.i. Kalkstein), 1) Grafschaft im Staate Alabama (Nordamerika), 22 QM.; Flüsse: Tennessee u. Elk Rivers; hügelig (Kalkgebirge, daher der Name); Producte: Mais, Weizen, Hafer; Dampfschifffahrt auf dem Tennessee River; 1850: 16,483 …   Pierer's Universal-Lexikon

  • Limestone — (engl., spr. laimstōn), soviel wie Kalkstein …   Meyers Großes Konversations-Lexikon

  • Limestone — (engl., spr. leimstohn), Kalkstein (s.d.) …   Kleines Konversations-Lexikon

  • limestone — (n.) late 14c., from LIME (Cf. lime) (n.1) + STONE (Cf. stone) (n.) …   Etymology dictionary


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