calcareous

• 石灰質の

　 　

WordNet

1. composed of or containing or resembling calcium carbonate or calcite or chalk (同)chalky

PrepTutorEJDIC

1. 石灰石の,石灰質の

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2013/03/06 21:35:37」(JST)

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Calcareous sandstone in Seven Sisters Country Park

Calcareous is an adjective meaning mostly or partly composed of calcium carbonate, in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines.

In zoology

"Calcareous" is used as an adjectival term applied to anatomical structures which are made primarily of calcium carbonate, in animals such as gastropods, i.e., snails, specifically about such structures as the operculum, the clausilium, and the love dart.

The term also applies to the calcium carbonate tests of often more or less microscopic Foraminifera. Note that not all tests are calcareous; diatoms and radiolaria have siliceous tests.

The Molluscs are calcareous, as are Calcareous sponges are sponges (Porifera), that have spicules which are made of calcium carbonate.

In botany

Calcareous grassland is a form of grassland characteristic of soils containing a lot of calcium carbonate from underlying chalk or limestone rock. Species of algae such as the green-segmented genus Halimeda are calcareous.

In medicine

The term is used in medicine in pathology, for example in "calcareous conjunctivitis" and "calcareous metastasis".

In geology

Calcareous mine in Perm Krai, Russia

The term calcareous can be applied to a sediment, sedimentary rock, or soil type which is formed from, or contains a high proportion of, calcium carbonate in the form of calcite or aragonite.

Marine sediments

Calcareous sediments are usually deposited in shallow water near land, since the carbonate is precipitated by marine organisms that need land-derived nutrients. Generally speaking, the farther from land sediments fall, the less calcareous they are. Some areas can have interbedded calcareous sediments due to storms, or changes in ocean currents.

Calcareous ooze is a form of calcium carbonate derived from planktonic organisms that accumulates on the sea floor. This can only occur if the ocean is shallower than the carbonate compensation depth (CCD). Below this depth, calcium carbonate begins to dissolve in the ocean, and only non-calcareous sediments are stable, such as siliceous ooze or red clay.

Calcareous soils

Calcareous soils are relatively alkaline, in other words they have a high pH. This is because of the very weak acidity of carbonic acid. Note that this is not the only reason for a high soil pH. They are characterized by the presence of calcium carbonate in the parent material and by a Calcic horizon, a layer of secondary accumulation of carbonates (usually Ca or Mg) in excess of 15% calcium carbonate equivalent and at least 5% more carbonate than an underlying layer.

In electrochemistry

Calcareous coatings, or calcareous deposits, are mixtures of calcium carbonate and magnesium hydroxide that are deposited on cathodically protected surfaces because of the increased pH adjacent to the surface.

List of calcareous lakes

Thompson Pond

References

English Journal

• Role of a productive lake in carbon sequestration within a calcareous catchment.

• Nõges P1, Cremona F2, Laas A2, Martma T3, Rõõm EI2, Toming K4, Viik M2, Vilbaste S2, Nõges T2.
• The Science of the total environment.Sci Total Environ.2016 Apr 15;550:225-30. doi: 10.1016/j.scitotenv.2016.01.088. Epub 2016 Jan 24.
• For a long time, lakes were considered unimportant in the global carbon (C) cycle because of their small total area compared to the ocean. Over the last two decades, a number of studies have highlighted the important role of lakes in both sequestering atmospheric C and modifying the C flux from the
• PMID 26815299

• The impact of cattle access on ecological water quality in streams: Examples from agricultural catchments within Ireland.

• Conroy E1, Turner JN2, Rymszewicz A3, O'Sullivan JJ3, Bruen M3, Lawler D4, Lally H5, Kelly-Quinn M6.
• The Science of the total environment.Sci Total Environ.2016 Mar 15;547:17-29. doi: 10.1016/j.scitotenv.2015.12.120. Epub 2016 Jan 9.
• Unrestricted cattle access to rivers and streams represent a potentially significant localised pressure on freshwater systems. However there is no consensus in the literature on the occurrence and extent of impact and limited research has examined the effects on aquatic biota in the humid temperate
• PMID 26780128

• A distinct section of the early bronze age society? Stable isotope investigations of burials in settlement pits and multiple inhumations of the Únětice culture in central germany.

• Knipper C1, Fragata M2, Nicklisch N3,4, Siebert A5, Szécsényi-Nagy A6, Hubensack V7, Metzner-Nebelsick C8, Meller H3, Alt KW3,4,9.
• American journal of physical anthropology.Am J Phys Anthropol.2016 Mar;159(3):496-516. doi: 10.1002/ajpa.22892. Epub 2015 Nov 17.
• OBJECTIVES: Inhumations in so-called settlement pits and multiple interments are subordinate burial practices of the Early Bronze Age Únětice culture in central Germany (2200-1700/1650 BC). The majority of the Únětice population was entombed as single inhumations in rectangular grave pits with a
• PMID 26572071

Japanese Journal

• 鵜川水系水質に関する研究（第１報） : 水系地質と渓流水中の溶存成分との関係

• 福崎 紀夫,近藤 友宏,Fukuzaki Norio,Kondoh Tomohiro
• 新潟工科大学研究紀要 (17), 19-27, 2012-12
• … The Ca^(2+) concentration is high in Asoshima River and Shimizudani River mountain streams and Jisaburou Shimizu spring water, where sedimentary Asoshima and Komanoma layers comprised of calcareous sandstone are distributed. …
• NAID 120005207756

• Spatial structure, rock type, and local environmental conditions drive moss and lichen distribution on calcareous boulders

• SPITALE Daniel,NASCIMBENE Juri
• Ecological research 27(3), 633-638, 2012-05-01
• NAID 10030924243

• Spatial structure, rock type, and local environmental conditions drive moss and lichen distribution on calcareous boulders

• Spitale Daniel,Nascimbene Juri
• Ecological research 27(3), 633-638, 2012-05
• NAID 40019262780

Related Links

• Calcareous - Wikipedia, the free encyclopedia

Jump to: navigation, search. Calcareous sandstone in Israel. Calcareous is an adjective meaning mostly or partly composed of calcium carbonate, in other words, containing lime or being chalky. The term is used in a wide variety of scientific ...

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