Limestone - Revision history

DavidB4-bot: /* See also */clean up & uniformity

2016-07-13T15:22:45Z

Philip J. Rayment: grammar (comma)

2007-11-10T06:46:28Z

grammar (comma)

TheGuy at 23:38, November 9, 2007

2007-11-09T23:38:39Z

TheGuy: New page: '''Limestone''' is a sedimentary rock composed mainly of the mineral calcite, or calcium carbonate (CaCO₃). In its natural form it comprises 15% of the earth's crust, and is...

2007-11-09T23:38:21Z

New page: '''Limestone''' is a sedimentary rock composed mainly of the mineral calcite, or calcium carbonate (CaCO3). In its natural form it comprises 15% of the earth's crust, and is...

New page

'''Limestone''' is a [[sedimentary rock]] composed mainly of the mineral calcite, or calcium carbonate (CaCO3). In its natural form it comprises 15% of the earth's crust, and is extensively used in the building industry, being a vital ingredient in aggregates such as cement and lime, and represents 71% of the crushed rock used in construction. If heated limestone can be decomposed to form lime (with a 56% yield), which is used in steel manufacturing, road construction and paper production.

Limestone forms either directly from water (the calcium and carbonate ions react and may crystallise if variances in temperature are high enough) or from the accumulation of shell fragments. This usually occurs in water of less than 20m in depth. It is mainly composed of calcite but also contains aragonite (CaCO3 with a different structure) and dolomite (CaMg(CO3)2). In its pure form it will appear white, however will take on a wide range of colours if impurities are present. If exposed to intense pressure and heat limestone will undergo metamorphosis to form marble.

==References==

* [http://www.mii.org/Minerals/photolime.html Mineral Information Institute - Lime]
* [http://encarta.msn.com/encyclopedia_761565838_2/Limestone_(mineral).html Encarta - Limestone (mineral)]

==See Also==

* [[Rock]]
* [[Geology]]

[[Category:Geology]]

← Older revision		Revision as of 15:38, October 18, 2008
Line 1:		Line 1:
−	'''Limestone''' is a [[sedimentary rock]] composed mainly of the mineral calcite, or calcium carbonate (CaCO<sub>3</sub>). In its natural form it comprises 15% of the earth's crust, and is extensively used in the building industry, being a vital ingredient in aggregates such as cement and lime, and represents 71% of the crushed rock used in construction. If heated, limestone can be decomposed to form lime (with a 56% yield), which is used in steel manufacturing, road construction and paper production.	+	'''Limestone''' is a [[sedimentary rock]] composed mainly of the mineral calcite, or calcium carbonate (CaCO<sub>3</sub>). In its natural form it comprises 15% of the earth's crust, and is extensively used in the building industry, being a vital ingredient in aggregates such as [[cement]] and lime, and represents 71% of the crushed rock used in construction. If heated, limestone can be decomposed to form lime (with a 56% yield), which is used in steel manufacturing, road construction and paper production.

	Limestone forms either directly from water (the calcium and carbonate ions react and may crystallise if variances in temperature are high enough) or from the accumulation of shell fragments. This usually occurs in water of less than 20m in depth. It is mainly composed of calcite but also contains aragonite (CaCO<sub>3</sub> with a different structure) and dolomite (CaMg(CO<sub>3</sub>)<sub>2</sub>). In its pure form it will appear white, however will take on a wide range of colours if impurities are present. If exposed to intense pressure and heat limestone will undergo metamorphosis to form marble.		Limestone forms either directly from water (the calcium and carbonate ions react and may crystallise if variances in temperature are high enough) or from the accumulation of shell fragments. This usually occurs in water of less than 20m in depth. It is mainly composed of calcite but also contains aragonite (CaCO<sub>3</sub> with a different structure) and dolomite (CaMg(CO<sub>3</sub>)<sub>2</sub>). In its pure form it will appear white, however will take on a wide range of colours if impurities are present. If exposed to intense pressure and heat limestone will undergo metamorphosis to form marble.

← Older revision		Revision as of 06:46, November 10, 2007
Line 1:		Line 1:
−	'''Limestone''' is a [[sedimentary rock]] composed mainly of the mineral calcite, or calcium carbonate (CaCO<sub>3</sub>). In its natural form it comprises 15% of the earth's crust, and is extensively used in the building industry, being a vital ingredient in aggregates such as cement and lime, and represents 71% of the crushed rock used in construction. If heated limestone can be decomposed to form lime (with a 56% yield), which is used in steel manufacturing, road construction and paper production.	+	'''Limestone''' is a [[sedimentary rock]] composed mainly of the mineral calcite, or calcium carbonate (CaCO<sub>3</sub>). In its natural form it comprises 15% of the earth's crust, and is extensively used in the building industry, being a vital ingredient in aggregates such as cement and lime, and represents 71% of the crushed rock used in construction. If heated, limestone can be decomposed to form lime (with a 56% yield), which is used in steel manufacturing, road construction and paper production.

	Limestone forms either directly from water (the calcium and carbonate ions react and may crystallise if variances in temperature are high enough) or from the accumulation of shell fragments. This usually occurs in water of less than 20m in depth. It is mainly composed of calcite but also contains aragonite (CaCO<sub>3</sub> with a different structure) and dolomite (CaMg(CO<sub>3</sub>)<sub>2</sub>). In its pure form it will appear white, however will take on a wide range of colours if impurities are present. If exposed to intense pressure and heat limestone will undergo metamorphosis to form marble.		Limestone forms either directly from water (the calcium and carbonate ions react and may crystallise if variances in temperature are high enough) or from the accumulation of shell fragments. This usually occurs in water of less than 20m in depth. It is mainly composed of calcite but also contains aragonite (CaCO<sub>3</sub> with a different structure) and dolomite (CaMg(CO<sub>3</sub>)<sub>2</sub>). In its pure form it will appear white, however will take on a wide range of colours if impurities are present. If exposed to intense pressure and heat limestone will undergo metamorphosis to form marble.

← Older revision		Revision as of 23:38, November 9, 2007
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	* [[Geology]]		* [[Geology]]

−	[[Category:~~Geology~~]]	+	[[Category:Rocks]]

@@ Line 8: / Line 8: @@
 * [http://encarta.msn.com/encyclopedia_761565838_2/Limestone_(mineral).html Encarta - Limestone (mineral)]
-==See Also==
+==See also==
 * [[Rock]]

Limestone - Revision history

DavidB4-bot: /* See also */clean up & uniformity

Philip J. Rayment: grammar (comma)

TheGuy at 23:38, November 9, 2007

TheGuy: New page: '''Limestone''' is a sedimentary rock composed mainly of the mineral calcite, or calcium carbonate (CaCO3). In its natural form it comprises 15% of the earth's crust, and is...

TheGuy: New page: '''Limestone''' is a sedimentary rock composed mainly of the mineral calcite, or calcium carbonate (CaCO₃). In its natural form it comprises 15% of the earth's crust, and is...