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MARL - 4 reference results
" Marl " Didn't Find
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marl
marl or bog lime, soil, essentially clay mixed with carbonate of lime, highly valued as a dressing or fertilizer. It crumbles rapidly and easily. Marl in which the lime is in the form of invertebrate shells is called shell marl. The term is loosely used for a variety of soils, some of which are low in lime content, e.g., the greensand marl of New Jersey. Marling of soil tends to lighten it, correct acidity, and promote nitrification.
The Columbia Electronic Encyclopedia Copyright © 2004.
Licensed from Columbia University Press
" Marl " Didn't Find
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Marl
Marl, city (1994 pop. 92,590), North Rhine-Westphalia, W Germany. It is an industrial and mining (coal, lead, and zinc) center, and also supports a number of chemical factories. Now a modern city, Marl was first mentioned in the 9th cent. and was chartered in 1936.
The Columbia Electronic Encyclopedia Copyright © 2004.
Licensed from Columbia University Press
marl

Earthy mixture of fine-grained minerals, which range widely in composition. Lime (calcium carbonate) is present as shell fragments of snails and bivalves, or as powder mixed with clay and silica-containing silt. Large deposits contain 80–90percnt calcium carbonate and less than 3percnt magnesium carbonate. With decreasing amounts of lime, calcium-containing marls are called clays and clayey limestones. Marls rich in potash (potassium carbonate), called greensand marls, are used as water softeners. Marls have also been used in the manufacture of insulating material and portland cement, as liming material, and in making bricks.

Learn more about marl with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Benthic macrofauna variations and community structure in Cenomanian cyclic chalk-marl from Southerham Grey Pit, SE England
Jan 01, 2009; Abstract: Cenomanian chalk-marl couplets from England represent the 20 ka Milankovitch precession cycle. Fossil communities from...
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New Marl LEDs offer best ever lumens per penny.
Jun 03, 2008; M2 PRESSWIRE-3 June 2008-Marl Optosource: New Marl LEDs offer best ever lumens per penny(C)1994-2008 M2 COMMUNICATIONS LTD...
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Marl in GBP100,000 train refurbishment.
Apr 02, 2008; M2 PRESSWIRE-2 April 2008-Marl International Limited: Marl in GBP100,000 train refurbishment(C)1994-2008 M2 COMMUNICATIONS LTD...
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Wide viewing angle added to Marl Indicator range.
Apr 16, 2008; M2 PRESSWIRE-16 April 2008-Marl: Wide viewing angle added to Marl Indicator range(C)1994-2008 M2 COMMUNICATIONS LTD...
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One of the World's most powerful LED drivers added by Marl Optosource.
May 19, 2008; M2 PRESSWIRE-19 May 2008-Marl Optosource: One of the World's most powerful LED drivers added by Marl Optosource(C)1994-2008 M2...
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