Talk:Shield volcano

message: The current article makes the bizarre claim that "Rift zones  are a prevalent feature on shield volcanoes that is rare on other volcanic types. The large, decentralized shape of Hawaiian volcanoes as compared to their smaller, symmetrical Icelandic cousins can be attributed to rift eruptions". What part of this makes any sense at all? Has the author ever even compared a map of Hawaii with a map of Iceland? It's Iceland that's "large", "decentralized" and "asymmetrical" full of fissure/rift eruptions. Wikipedia itself spends 3 times as long talking about Iceland's fissures as it does Hawaii's. Iceland is far more fissure eruption prone than Hawaii, lying on a divergent plate boundary. We've got a fissure eruption ongoing right now on Bárðarbunga/Holuhraun that's already erupted more than any Hawaiian eruption in modern history, at a faster rate than any of them too. And it's hardly a record setter - one of our fissure eruptions in the 1700s was over 20 kilometers long, released 120 million tonnes of SO2, and is responsible for as many as 6 million deaths worldwide. And they're also implying that Iceland doesn't have shield volcanoes, when our biggest volcanoes are all shields. (including Bárðarbunga). Basically, what on Earth is this article talking about here? -- 213.176.153.100 (talk) 12:55, 9 October 2014 (UTC)
thread_title:  Rift eruptions rare in Iceland? 

message: Shield volcanoes are formed by lava flows of low viscosity — lava that flows easily.
This should be changed to:
Shield volcanoes are formed by lava flows of high viscosity — lava that flows easily.
—The preceding unsigned comment was added by 24.83.141.120 (talk • contribs).
: Not according to my reading of the viscosity article. --Pmsyyz 22:23, 19 July 2007 (UTC)
replies: text: Pmsyyz is correct. hike395 03:45, 20 July 2007 (UTC)

text: Viscosity is the resistance to flow, therefore a low viscosity would have low resistacne and flow easily. Auwerdajn (talk) 03:23, 8 December 2008 (UTC)
thread_title:  Viscosity? 

message: *This is evident. I propose to merge both articles or, at least, citate here the one on caldera. --Fev (talk) 03:47, 6 July 2008 (UTC)
replies: text: Many shield volcanoes have calderas, that's the only similarity.Guanlongwucaii (talk) 09:56, 29 May 2009 (UTC)
thread_title: Similarity between shield volcano and caldera

message: Changed the section title "FAQ" which is very unencyclopedic to "Information" which isn't much better. More thought needed... 217.34.222.220 (talk) 13:17, 14 July 2008 (UTC)
thread_title: FAQ/ Information

message: What exactly is the difference between a Shield volcano and a stratovolcano? The article doesn't really explain this very well. --The High Fin Sperm Whale (talk) 22:27, 21 May 2009 (UTC)
replies: text: I've now mentioned and (linked to) stratovolcanoes, since they do provide a useful contrast. But I don't think a detailed comparison is appropriate here.  I think the separate articles already cover the important differences. -- Avenue (talk) 04:10, 22 May 2009 (UTC)
thread_title:  [[Shield volcano]] or [[stratovolcano]]? 

message: Why does the Encyclopedia of Volcanoes refer to both shield volcanoes and stratovolcanoes as 'composite volcanoes'? --Guanlong wucaii 14:30, 11 February 2010 (UTC)
thread_title:  Composite Volcanoes 

message: This article needs a major rewrite big time. I just reworded the first sentence in the introduction from "A Shield volcano is a type of volcano built almost entirely of fluid lava flows." to "A Shield volcano is a type of volcano commonly built almost entirely of fluid lava flows." to make it more obvious. Pyroclastic shields are NOT made almost entirely of fluid lava flows. Instead, they are composed largely of pyroclastic material. Another less common type of shield volcano are those composed of andesite and/or rhyolite. But it seems like this article focuses primarly on the most common shields composed of basalt as far as I'm aware of. I would add a bit for the andesite and rhyolite shields, but I do not know the geology of them too well. Volcanoguy 03:30, 22 August 2010 (UTC)
replies: text: another factual error: if shield volcanoes are shallow at the bottom, steep in the middle, and flat at the top, they cannot be convex. See that article for definition of convexity. —hike395 (talk) 13:00, 26 August 2010 (UTC)
replies: text: True. Examples of shields that are not mainly composed of basalt are the Rainbow, Ilgachuz and Itcha ranges in British Columbia. A quote from the book Volcanoes of North America: United States and Canada about the Rainbow Range: "During a period of ~2 m.y., extrusion of highly fluid basic and silicic lava flows built up the gently sloping flanks of the shield volcano. The stratiform flank zone surrounds a central complex of small domes, short, stubby flows, and small intrusive bodies. Alkaline and peralkaline lava flows from four volcanic episodes make up an 845-m composite section on the north flank of the shield volcano. Basal comenditic trachyte flows are unconformably overlain by flows and flow breccias of mugearite. A sequence of 40-60-m-thick columnar-jointed comendite flows blankets the underlyingunits and gives the volcano its shieldlike form. Hawaiite dikes, plugs, and minor capping flows are scattered over the north flank. Comendite flows, which commonly have a glassy selvage at the base, account for 75& of the lavas in the flank zone Anahim Peak, a small center on the northeast flank of the main volcano, consists of a small (<2 km2) pile of 7 thick hawaiite flows cut by a trachyte plug. The unique characteristic of the Rainbow Range is that, although the flank zone is composed dominantly of silicic lava (64-71% SiO2), the form of the volcanic edifice is a shield volcano. The apparent morphological paradox of a silicic shield volcano, made of flows that should be too viscous to form such a shape, is also found in the Kenya rift. It occurs because the peralkaline nature of the silicic lavas decreases the viscosity of the flows a minimum of 10-30 times over that of calc-alkaline silicic flows." Sounds like the Rainbow Range is a unique shield volcano. It erupted lava that is normally too viscous to form shields. Volcanoguy 05:26, 27 August 2010 (UTC)
thread_title:  In need for major work 

message: I was asked to give a recommendation on how to organize this article. I think that the key point about Shield volcanoes is that they form from low-viscosity mafic lavas. That can be used as a starting point from which to investigate the different environments that produce shield volcanoes and as an underlying theme. So perhaps:
* A section of their formation and why the viscosity (and the composition that allows that) is important
* A section of geological features typically associated with shield volcanoes
* A case-study-ish section with subsections on each major geologic environment in which shield volcanoes form, and examples of those environments
* Shield volcanoes and society (hazards, people living on them, etc.)
That's mostly off the top of my head, so don't put too much stock in it, but I sort of like it as a scheme. Cheers, Awickert (talk) 05:46, 13 February 2011 (UTC)
thread_title:  Organizational recommendation 

message: The section has only two sentences regarding volcanoes which can be easily absorbed in the rest of the article. The rest belongs on shield because it discusses the etymology of that word and has nothing to do with volcanoes. 173.112.160.152 (talk) 04:12, 22 June 2011 (UTC)
replies: text: Seems reasonable EdwardLane (talk) 17:43, 11 September 2012 (UTC)
thread_title:  remove etymology section 

message: For example, the popup information for a volcano link in the middle of the Pacific says its in California. Another popup says its in Congo but the link is in South Africa. A third names a volcano on New Zealand but it is down near the Antarctic. Someone should align the image and the links.  — Preceding unsigned comment added by 101.103.131.42 (talk) 09:39, 3 January 2012 (UTC)
thread_title:  Clickable links on world map are all misplced 

message: The one for La Grille mentions that it is in "the Cameron".  This should be "Comoros".  — Preceding unsigned comment added by 198.49.222.20 (talk) 15:54, 13 September 2012 (UTC)
thread_title:  Clickable red pyramids on shield volcano map 

message: Post shield stage is an orphan stub, is it worth an article on its own, or just merge it into a subsection of this article? EdwardLane (talk) 22:17, 17 June 2013 (UTC)
thread_title:  De Orphan/Merge 

message: Hello fellow Wikipedians,
I have just modified 2 external links on Shield volcano. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive https://web.archive.org/web/20110719101930/http://www.gzn.uni-erlangen.de/fileadmin/data/kruste/mitarbeiter/Marcel/JPET2003.pdf to http://www.gzn.uni-erlangen.de/fileadmin/data/kruste/mitarbeiter/Marcel/JPET2003.pdf
*Added archive https://web.archive.org/web/20070611035239/http://geoleoedocs.sub.uni-goettingen.de:8080/dspace/bitstream/gledocs-108/1/Andrews%2BGudmundsson.pdf to http://geoleoedocs.sub.uni-goettingen.de:8080/dspace/bitstream/gledocs-108/1/Andrews%2BGudmundsson.pdf
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
Cheers.—InternetArchiveBot (Report bug) 07:21, 22 January 2018 (UTC)
thread_title:  External links modified (January 2018) 

message: What time of volcano 2001:4455:61E:5D00:AD7D:B79E:96FB:CD95 (talk) 14:15, 4 September 2022 (UTC)
thread_title:  Science 

message: Prior content in this article duplicated one or more previously published sources. The material was copied from: song by Slim Shady (which one I can't tell you). Copied or closely paraphrased material has been rewritten or removed and must not be restored, unless it is duly released under a compatible license. (For more information, please see "using copyrighted works from others" if you are not the copyright holder of this material, or "donating copyrighted materials" if you are.)
For legal reasons, we cannot accept copyrighted text or images borrowed from other web sites or published material; such additions will be deleted. Contributors may use copyrighted publications as a source of information, and, if allowed under fair use, may copy sentences and phrases, provided they are included in quotation marks and referenced properly. The material may also be rewritten, provided it does not infringe on the copyright of the original or plagiarize from that source. Therefore, such paraphrased portions must provide their source. Please see our guideline on non-free text for how to properly implement limited quotations of copyrighted text. Wikipedia takes copyright violations very seriously, and persistent violators will be blocked from editing. While we appreciate contributions, we must require all contributors to understand and comply with these policies. Thank you.  ― Blaze WolfTalkBlaze Wolf#6545 14:20, 5 October 2022 (UTC)
thread_title:  Copyright problem removed 

message: Prior content in this article duplicated one or more previously published sources. The material was copied from: https://www.billboard.com/music/lyrics/eminem-lose-yourself-lyrics-1235036603/. Copied or closely paraphrased material has been rewritten or removed and must not be restored, unless it is duly released under a compatible license. (For more information, please see "using copyrighted works from others" if you are not the copyright holder of this material, or "donating copyrighted materials" if you are.)
For legal reasons, we cannot accept copyrighted text or images borrowed from other web sites or published material; such additions will be deleted. Contributors may use copyrighted publications as a source of information, and, if allowed under fair use, may copy sentences and phrases, provided they are included in quotation marks and referenced properly. The material may also be rewritten, provided it does not infringe on the copyright of the original or plagiarize from that source. Therefore, such paraphrased portions must provide their source. Please see our guideline on non-free text for how to properly implement limited quotations of copyrighted text. Wikipedia takes copyright violations very seriously, and persistent violators will be blocked from editing. While we appreciate contributions, we must require all contributors to understand and comply with these policies. Thank you.  ― Blaze WolfTalkBlaze Wolf#6545 14:51, 5 October 2022 (UTC)
thread_title:  Copyright problem removed 

message: Prior content in this article duplicated one or more previously published sources. The material was copied from: https://genius.com/Haddaway-what-is-love-lyrics. Copied or closely paraphrased material has been rewritten or removed and must not be restored, unless it is duly released under a compatible license. (For more information, please see "using copyrighted works from others" if you are not the copyright holder of this material, or "donating copyrighted materials" if you are.)
For legal reasons, we cannot accept copyrighted text or images borrowed from other web sites or published material; such additions will be deleted. Contributors may use copyrighted publications as a source of information, and, if allowed under fair use, may copy sentences and phrases, provided they are included in quotation marks and referenced properly. The material may also be rewritten, provided it does not infringe on the copyright of the original or plagiarize from that source. Therefore, such paraphrased portions must provide their source. Please see our guideline on non-free text for how to properly implement limited quotations of copyrighted text. Wikipedia takes copyright violations very seriously, and persistent violators will be blocked from editing. While we appreciate contributions, we must require all contributors to understand and comply with these policies. Thank you.  ― Blaze WolfTalkBlaze Wolf#6545 20:33, 7 November 2022 (UTC)
thread_title:  Copyright problem removed