Talk:Limestone

in toothpaste? can we find a source for that?

Kaens 21:17, 20 December 2006 (UTC)

Gillson, J.L., and others, 1960, The Carbonate Rocks: in Industrial Rocks and Minerals, 3rd ed., Amer. Inst. Mining, Metallurgical, and Petroleum Engineers, p. 189. Geologyguy 21:51, 20 December 2006 (UTC)

Also, online in narrative form, here (Utah Geological Survey) Geologyguy 22:00, 20 December 2006 (UTC)

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Limestone is a sedimentary rock. It is used in lots of ways; it used for buildings, for agriculture etc. It is strong, but easy to cut when you have a big sword. Easily corrodes in acid rain

Whitney

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How is limestone "readily available relatively easy to cut into blocks" and yet "quite expensive"? Kwertii 04:42, 21 Oct 2004 (UTC)

What different types of limestone are there

In reply..

In reply to both previous discussion topics: 1) "Easy to cut when you have a big sword"??? (It's the year 2006, not 1206!)

2) Kwertii, the rock is fairly common therefore readily available, and it can be chopped into blocks of all sizes, but the extraction process is expensive - involving blasting the rock with explosives, seperating it from the impurties, and getting rid of the impurities produced. Therefore, the rock costs about £5/tonne, or $9/tonne. --LeFrog 11:06, 26 May 2006 (UTC) 3)how does it transport the limestone

Fixing "Uses of Limestone" Image

On Thursday September 28th, 2006 I fixed the "Uses of Limestome" image at the bottom of the page to center it. The image used to be docked on the left side of the page but it was causing problems with the text below it.

Ratio of limestone to marine life

For there to be so much calcium carbonate or lime on the planet, there must of been a hell of a lot of marine life over 290 million years ago, to have all this lime all over the planet. are you sure there is not some natural chemical reaction that has formed all this excess limestone?

Some people say Limestone can be formed two ways, by living things and by a chemical reaction. It gets a little complicated from here. I'll start off the chemical reaction, Travertine, according to wikipedia travertine is not limestone but it is Calcium Carbonate? Isn't limestone calcium carbonate too? But anyways, the point is that travertine is not as common as Limestone made by living things. When the 'living things' were actually living, almost all of the earth was covered with water so there was a lot more of them then there is today. Also, as you stated they had 290 Million years to be born and die to eventually turn into limestone. It's the same thing as Algae and Zooplankton turning into millions if not billions of gallons of Petroleum that we use today. Bear21 06:09, 5 October 2006 (UTC)Bear21

continued malicious edits in the last 24 hours

So, lots of very malicious edits to this article. It looks like the same person even though they are coming from different IPs, and they appear to be deliberately misleading. Perhaps we should start considering a semi-protect on this article. Debivort 21:54, 9 January 2007 (UTC)

OK with me! I've never asked for that (don't know procedure), so if you want to, go for it, I guess. Cheers and thanks - Geologyguy 22:38, 9 January 2007 (UTC)

Health effects of lime dust

I am starting a job hauling burnt lime to a steel mill. It is very dirty and dusty. Are there any health issues known involving burnt lime, and the dust?

Try the links at this Google Search. Geologyguy 16:44, 28 January 2007 (UTC)

How hard is Limestone on the Mohs scale

How hard is Limestone on the Mohs scale? I can't tell. Can anyone tell me?

--DέǍtЋŜǎŝЏЌə

Well, as a rock rather than a mineral, it probably doesn't exhibit a single standard hardness. That said, it's hardness will largely reflect that of it's main constituent mineral, calcite: 3. Debivort 07:51, 6 March 2007 (UTC)

march 07

The page is taking quite a beating now. I've put in a request for a semi-protection. Hopefully this spate of vandalism will die down. Cheers, Debivort 19:17, 8 March 2007 (UTC)

Exploding Limestone

Is it true that Limestone will explode in your stomach if you swallow it? —The preceding unsigned comment was added by Crazyboy899 (talk • contribs) 11:00, 8 May 2007 (UTC).

When you take antacids like Tums and Rolaids and generics, you are essentially eating limestone. So, no, it does not "explode" in the sense you probably mean. Geologyguy 13:00, 8 May 2007 (UTC)

Limestone and Iron Ore

Question: Is limestone used in the production of iron from iron ore? Oranges91 13:00, 3 June 2007 (UTC)

Yes. See Flux (metallurgy) and Smelting. Cheers Geologyguy 13:16, 3 June 2007 (UTC)

Spam

The link to superior cut stone maybe spam. Please respond with your comments.Bear21 02:24, 11 July 2007 (UTC)

Promotional link posing as reference removed. Vsmith 02:43, 11 July 2007 (UTC)

Water in limestone caves

Question: When rainwater falls in limestone caves, what will the pH be - acid or alkaline? What reaction takes place? How long will it take that water to become the same pH as mineral water? Hannahdalton9 09:39, 30 August 2007 (UTC)

Rain water is usually slightly acidic, pH something like 6.5 or 6.0 (see Rain) - water reacts with carbon dioxide in the atmosphere to form weak carbonic acid, which, over time (millions of years), is sufficient to dissolve limestone. Limestone does not crop out much in the US East, whereas it makes high resistant ridges in the US west, simply because it rains more in the east. It is not because of greater acidity, nor, until recently, because of pollution-induced acidity, but just because of greater volume of a very weak acid. When limestone dissolves, the reaction between a weak aqueous acid and calcium carbonate has the effect of increasing pH (Tums and Rolaids are basically calcium carbonate), but with new water (slightly acid) coming in all the time from rain, it would be unlikely for it to ever really completely equilibrate. I have no idea how long the process would take. Cheers Geologyguy 13:59, 30 August 2007 (UTC)

Types of Limestone

Expanding the article to include types of limestone would be useful. Specifically, are there characteristics of cafe pinta limestone from Colombia that make it more or less desirable as a building material? Jkw12345 (talk) 22:54, 15 March 2008 (UTC)

How much limestone sand is needed to correct a better ph level in a trout stream

I know of a trout stream that has a low ph level,the fishing is rather dead. I want to improve the aquatic environment for the long term. I find it difficult to get information in regards to this issue' Am I taking on a task beyond my abilities? —Preceding unsigned comment added by 124.181.139.167 (talk) 02:58, 25 March 2008 (UTC)

Limestone in haunted locations???

Im researching my theory of a connection between limestone and residual hauntings.Im just wondering if there is any evidence that could help support my theory.I know there are theories of acient pottery holding sound waves.Is there any culture that made pottery from limestone?And has anyone ever herd of limestone absorbing energy or sound?sorry im just a paranormal researcher not a geogolist but i have noticed a lot of the residule activity i have seen is in limestone buildings and im just looking for answers. —Preceding unsigned comment added by JolietParanormal (talk • contribs) 01:41, 9 April 2008 (UTC)

Mars

Removed the following:

Limestone has been found on Mars, suggesting the possible long-ago presence of liquid water containing marine life forms.

Calcium carbonate in the soil isn't limestone, even though the news blurb uses the word. And... "marine life forms"? Kinda stretching it there from WP:SYN to WP:OR, no? Vsmith (talk) 11:11, 30 September 2008 (UTC)

Confusing

I think this article needs to be re-written in order to
present the subject in a simpler or more clear way.

--Encyclopedia77 16:31, 5 November 2008 (UTC)

http://simple.wikipedia.org/wiki/Limestone 24.188.131.67 (talk) 01:52, 12 January 2009 (UTC)