Talk:Weathering

message: I reverted the edit by anon 81.86.119.147 as the text appears to be a cut n paste job from some source. If I'm mistaken, please discuss here. Vsmith 14:08, 13 November 2005 (UTC)
thread_title:  posssible copyvio 

message: I am in two minds about this one. Should I just delete everything as it looks like a copyvio (nothing from google) and redirect here or try and incorporate some of the information? The page has no significant links (this page now I put the merge tag on and a big stubs list.--NHSavage 12:58, 23 September 2006 (UTC)
replies: text: Just made it a redirect here. It appears to have been copied from somewhere - textbook or some class notes? As no source is given its status is questionable. Added by an anon a year ago. The info is still there in page history if someone wants to incorporate some of it here - again, needs sourcing. Vsmith 14:02, 23 September 2006 (UTC)
thread_title:  Merge from [[Mineral weathering]] 

message: There have been several fascinating recent article in the most recent issues of Reviews of Modern Physics and Nature that rather redefine the frost induced weathering process. Recommended reading for anyone interested in the processes! Skål - Williamborg (Bill) 18:46, 2 December 2006 (UTC)
thread_title:  Recent articles on frost action 

message: i happen to be studying geography for IB... we're asked about weathering and rock mass strength. the main impact of weathreing is a reduction in rock mass strength, or so i'm told. a) Is this true, and b) shouldn't this be added to the article, along with a section on the parts rock mass strength?--Lenary (talk) 09:04, 30 June 2008 (UTC)
thread_title:  Rock Mass strength 

message: I have changed the section heading "Hydrolysis" to "Hydrolysis and Silicate Weathering".  The impetus for doing so lies in the Ice Age page which makes clear the importance of silicate weathering, yet the Wikipedia has no entry for it.  At least now "Silicate Weathering" appears somewhere.  (Note that the links are to "silicates" and to "weathering", both of which flood the reader with text, but do not feature the topic of "silicate weathering" per se.)  Hope this helps.
It would be nice if those who know would go a step further and show how the CO2 is sequestered in rock.  Readers not in the field like me imagine the carbonic acid bubbling back the CO2.  A few words on where we go from here -- ocean pH drop? rock sequestration? -- would fit in well.
To recap, the ice age page drives readers here by pointing out that silicate weathering is a global sink for CO2.  During global ice ages across geological time, silicate weathering is reduced when ice sheets reduce the amount of continental crust exposed to weathering.  The resulting rise in atmospheric C02 is thought to be one factor for bringing the earth out of an ice age (and, of course, setting us up for the next cycle). Thanks, all.   Jerry-va (talk) 16:42, 6 December 2009 (UTC)
thread_title:  Silicate weathering 

message: Presently the section reads, in part:
Hydrolysis is a chemical weathering process affecting silicate and carbonate minerals. In such reactions, pure water ionizes slightly and reacts with silicate minerals. An example reaction:
        Mg2SiO4 + 4H+ + 4OH- ⇌ 2Mg2+ + 4OH- + H4SiO4
    olivine (forsterite) + four ionized water molecules ⇌ ions in solution + silicic acid in solution
This reaction results in complete dissolution of the original mineral, assuming enough water is available to drive the reaction. 
I just reverted a change to this paragraph and noticed that the example reaction does not really support the ensuing sentence.  silicic acid and free OH would not both accumulate without further reaction.  Before I attempt to fix this by adding "and dilute or wash away the reaction products" at the end of the sentence I will ask whether this is the example we want here?  Dankarl (talk) 13:44, 22 December 2010 (UTC)
thread_title: best example?

message: The The U.S. Army Corps of Engineers' Cold Regions Research & Engineering Laboratory originally published "Pothole Primer: A Public Administrator's Guide to Understanding and Managing the Pothole Problem" (Special Report 81-21) in September 1981 explains that pothles are simply the result of water-saturated soil, plus traffic. A  review article explains, "One result is potholes, especially in the spring when water saturates the roadway's ground support and weakens its ability to stand up to heavy traffic." So, frost effects are a contributing, not primary cause of potholes. I plan to delete the reference from this article. --User:HopsonRoad 14:11, 18 April 2010 (UTC)
thread_title:  Potholes are not frost weathering 

message: weathering is the first thing you should understand in grades 4-6 and you need to know it to become a scientist you need to know lots of things to become a scientist  —Preceding unsigned comment added by 24.189.135.48 (talk) 23:25, 11 May 2010 (UTC)
thread_title:  why it important to know this 

message: I read in the journal Science about ten years ago that of the (major) minerals making up the Earth's surface (rock) only two are chemically/thermodynamically stable.  If I recall, hydrolysis, dehydration, oxidation and carbonation were the major reactions.  Unfortunately, I have not run across this information again.  If one of you geochemist types could confirm that the land surface of the Earth is intrinsically *not* chemically stable, then I think that would be an important fact to mention here.  (Quartz was one of the two, btw.  Would love to remember what the other one was...gneiss?? IDK). (and by 'stable' the article meant in the conditions to whcih they are exposed).71.31.147.72 (talk) 17:33, 5 February 2012 (UTC)
replies: text: 3 years later - I think I found it: zircon. Although I also have seen that clays are "stable" under STP surface conditions72.172.10.20 (talk) 23:33, 6 May 2015 (UTC)
thread_title:  Chemical Weathering 

message: Hi just a friendly anon here with a few degrees in geography--so not willing to edit the page myself but could someone please revisit the sentences: 
"This process speeds up with a decrease in temperature, not because low temperatures generally drive reactions faster, but because colder water holds more dissolved carbon dioxide gas. Carbonation is therefore a large feature of glacial weathering."
No source is cited and I believe while the first may be true the second claim to be the opposite of reality--in cold climates, even with abundant precip, carbonate rocks tend to form UPLANDS, not be eroded quickly. When we look for prime examples of karst topography, the characteristic landscape formed when carbonic acid dissolution dominates, we see it in warm to hot climates--like southern China, the Philippines, Mexico's Yucatan.  Furthermore, what's "glacial weathering"? Glacial erosion, transport, and deposition are well understood mechanical processes covered exhaustively in other sections of Wikipedia. 
I recommend deleting these two sentences.  — Preceding unsigned comment added by 24.16.213.251 (talk) 06:53, 30 June 2014 (UTC)
thread_title: =Dissolution and Carbonation

message: A new addition to the article makes disaggregation a synonym of mechanical weathering.  In my very nonexpert understanding it would be either a synonym of weathering or an alternative subclass of weathering.  Experts please comment. Dankarl (talk) 18:11, 9 August 2012 (UTC)
thread_title:  Disaggregation 

message: Ice_lens article makes it clear freeze-thaw is a different process and that it is not so significant. IN this article the 2 are conflated meaning that taken together this article is contradicting THAT article. Both should be updated by an expert with references (which is why I have not done it).  — Preceding unsigned comment added by 178.190.69.17 (talk) 19:02, 17 March 2013 (UTC)
thread_title:  Contradicts Article on Ice Lens

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thread_title:  External links modified (January 2018) 

message: There are three type of weathering which include biological,chemical and physical weathering 102.244.74.195 (talk) 20:23, 26 April 2022 (UTC)
replies: text: The article explains that there may be a biological component to physical and chemical weathering, but does not describe it as a separate process. HopsonRoad (talk) 00:02, 27 April 2022 (UTC)
thread_title:  Geography 

message: Give four reasons 41.13.70.147 (talk) 11:57, 11 September 2022 (UTC)
replies: text: Please read the article as it explains the process and its importance in great detail. Vsmith (talk) 16:35, 11 September 2022 (UTC)
thread_title:  Why is weathering of rocks so important? 

message: What is weathering tomorrow research about weathering 41.202.219.66 (talk) 15:50, 26 February 2024 (UTC)
thread_title:  Geography