limestone
From: The Columbia Encyclopedia, Sixth Edition
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Date: 2008
limestone sedimentary rock wholly or in large part composed of calcium carbonate. It is ordinarily white but may be colored by impurities, iron oxide making it brown, yellow, or red and carbon making it blue, black, or gray. The texture varies from coarse to fine. Most limestones are formed by the deposition and consolidation of the skeletons of marine invertebrates; a few originate in chemical precipitation from solution. Limestone deposits are frequently of great thickness. The action of organic acids on underground deposits causes such formations as the Luray Caverns, the Carlsbad Caverns, and Mammoth Cave. Limestone is used as a flux in the extraction of iron, as an ingredient in Portland cement, as a source of lime (see calcium oxide ), as a building stone, and for ornamentation. Among the important varieties of limestone are marl , chalk , oolite , travertine , dolomite , and marble .
Author not available, LIMESTONE.,
The Columbia Encyclopedia, Sixth Edition 2008
The Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press
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... about 0.01 pg arsenic (V) per gram of limestone granules. Although arsenic was consistently removed from the natural water by limestone, widespread use of the process will require ... that impede arsenic removal. Summary Limestone-based material has the potential to reduce ... work demonstrated arsenic ...
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Spreading the Wealth of Limestone.
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Limestone is more often being recognized as a luxury, the value ... of a cozy kitchen have benefited from the inclusion of limestone. This stone possesses many complementary characteristics ... suitable for a range of installations. The luxury of limestone is noted in many residential applications, yet it is ...
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Stung once, Limestone waits Employees, residents 'optimistic' as DFAS hangs in balance
Bangor Daily News Bangor, ME; 8/10/2005; JEFF TUTTLE; OF THE NEWS STAFF; 1330 words;
LIMESTONE - Last month it was a numbers game. This month, a waiting ... about it," said Bryan Thompson, a staff accountant at Limestone's Defense Finance and Accounting Service, which is targeted ... speak, countering Pentagon calculations that put the Limestone facility - as well as 22 others - on the closure ...
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Indiana's limestone is a rock of ages
The Milwaukee Journal Sentinel; 11/10/2002; BETH ROSENBERG; 668 words;
Indiana's limestone is a rock of ages Great buildings have ... S. Capitol has seen the stately gray limestone that generations of Indiana stoneworkers ... replacement stone quarried by Indiana Limestone Co., which also provided the original ...
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FOSSIL MARINE VERTEBRATES FROM THE LOWERMOST GREENHORN LIMESTONE (UPPER CRETACEOUS: MIDDLE CENOMANIAN) IN SOUTHEASTERN COLORADO
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Portland-limestone cement - the UK situation
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The cladid crinoid Barycrinus from the Burlington Limestone (early Osagean) and the phylogenetics of Mississippian botryocrinids
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DFAS to get fair hearing, general says Limestone workers rally to save facility from closure
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LIMESTONE - Gen. Lloyd W. Newton could not be pinned down Tuesday on whether Defense Finance and Accounting Services in Limestone will be taken off the Department of Defense list for ... session with employees and the administration of the Limestone DFAS center, with state and local politicians and members ...
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Nonprofits joining forces: Athens-Limestone and Huntsville community hospitals announce partnership.
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... said Cary Payne, acting CEO for Athens-Limestone. For example, by partnering, they can ... such as Huntsville providing Athens-Limestone the ability to offer cardiology service ... such as monitors. That way, if Athens-Limestone transfers an emergency patient to Huntsville, the Athens-Limestone ...
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Kinta limestone hills under siege
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... wasted. The principal economic use of limestone is still as a raw material for infrastructure ... has put considerable pressure on the limestone hills. More and more housing projects ... having to destroy or encroach upon the limestone. In fact, as examples show, it can be commercially viable to remove ...
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