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The following is an archived discussion of a featured article nomination. Please do not modify it. Subsequent comments should be made on the article's talk page or in Wikipedia talk:Featured article candidates. No further edits should be made to this page.

The article was promoted by David Fuchs via FACBot (talk) 15 May 2024 [1].

Mount Hudson

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Nominator(s): Jo-Jo Eumerus (talk) 09:50, 13 March 2024 (UTC)[reply]

This article is about one of Chile's most active volcanoes. Mount Hudson had several intense eruptions during the Holocene, the latest of which took place in 1991 and had substantial impacts on . A few notes: The table contains only cross-correlatable tephras; not all tephras are present at all sites hence the incompleteness. While the 1991 eruption is the best documented in its history, it isn't actually the most significant either in the volcano's history or its impact on humans in South America, hence why it gets only a little more coverage than the others. That and I think a detailed coverage might overwhelm the article. Jo-Jo Eumerus (talk) 09:50, 13 March 2024 (UTC)[reply]

Image review by ZooBlazer

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  • File:Cerro hudson.jpg - Is used in the infobox and has proper licensing, but could use alt text. The source link also appears to be broken/dead.

Two total images in the article, one being the map of Chile to mark the location of Mount Hudson. -- ZooBlazer 18:00, 15 March 2024 (UTC)[reply]

ALT text added and source fixed. Jo-Jo Eumerus (talk) 11:12, 16 March 2024 (UTC)[reply]
Looks good. The image review passes. -- ZooBlazer 17:50, 16 March 2024 (UTC)[reply]

HF

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I'll review this but it'll probably be a few days - I've got a GA review and a FAR review to finish before I can get to this. Hog Farm Talk 15:38, 19 March 2024 (UTC)[reply]

  • "It is often erroneously considered the southernmost." - the statement in the source is " including Hudson, the southernmost in the Andean Southern Volcanic Zone (SVZ).". This doesn't really support the footnote content here
    This one's a tough one - lots and lots of sources say that Hudson is the southernmost SVZ volcano. They are demonstrably wrong about this because Río Murta (volcano) is farther south still and is considered part of the SVZ, but it is obscure so I guess many sources just don't consider them. I think we need some formulation to point this out. Jo-Jo Eumerus (talk) 09:32, 23 March 2024 (UTC)[reply]
    If it's only one or two sources that are clearly wrong, I usually just ignore them. But in this case, it sounds like a lot of sources make this error. Maybe It is sometimes considered the southermost ... [three or four of the higher-quality refs making this statement], but Rio Murta is part of the SVZ and is further source.[supporting reference]" if the references will support this outright? Hog Farm Talk 02:05, 24 March 2024 (UTC)[reply]
    Done. Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]
  • "During eruptions, pyroclastic material and lava can melt the ice." - is this necessary? It seems, well, obvious
    Sometimes the ice is simply run over instead, so yes. Also, how much of the ice melts is important at times. Jo-Jo Eumerus (talk) 09:32, 23 March 2024 (UTC)[reply]
  • I'm assuming that AVZ is the Austral Volcanic Zone but this is never explicitly stated
    Buh, not sure how I missed this. Added. Jo-Jo Eumerus (talk) 09:32, 23 March 2024 (UTC)[reply]
  • "The composition of Hudson rocks diverges from that of other SVZ volcanoes" - is it known why?
    Probably b/c it lies just east of the triple junction. I am not sure that any of the sources says so explicitly, Weller 2015 and Kilian 1993 might. Jo-Jo Eumerus (talk) 09:32, 23 March 2024 (UTC)[reply]
  • Since we discuss the flora of the volcano, do any of the sources provide detail on the presence or absence of fauna?
    There probably is, but I haven't seen any source discussing any fauna relating to Hudson specifically. Jo-Jo Eumerus (talk) 09:32, 23 March 2024 (UTC)[reply]

Stopping for now; I'm ready for the eruption history material and will hopefully start back tomorrow. Hog Farm Talk 03:24, 23 March 2024 (UTC)[reply]

  • "The closest tephra record to Hudson is the Laguna Miranda record 50 kilometres (30 mi), which shows on average one tephra layer every 225 years " - this feels like it is missing a word somewhere in the vicinity of the 50 kilometres
    Added word. Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]
  • "Thicknesses reach 4 to 20 centimetres (2 to 8 in),[110] thicker than deposits closer to the volcano" - do the sources say why? This seems unexpected
    Aye, sometimes ash layers have secondary thickness maxima. Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]
  • "-21 (1971 AD)" in a Dates Before Present table. Is Present being calibrated at 1950?
    Yes, that's the radiocarbon calibration date.Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]
  • "The H2 eruption occurred about 4,200 years[j] ago." with the footnote stating "Older estimates of its age are 3600[107] or 3920 BP[17]". What does "older estimates" mean here? These estimates are for newer dates than the one given in the main text and of the five sources used for the sentence for the 4,200 bp age, only two are actually newer sources than the footnote sources. I'm not sure what "old estimates" means here
    It means that more recent dating estimates are about 4,200 years ago e.g this one. I don't like spelling out exact values b/c they tend to vary for every site. Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]
  • " Not fluorosis, as is commonly reported.[155]" - I'm struggling to find this in the source although admittedly it is hard to look for it as all of the various tab on the page share the same URL
    It's the one at October 1991 (BGVN 16:10) in the "Bulletin Reports" tab. Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]
  • "Chile Volcanoes (USGS)" - this external link redirects to a homepage now - can this be pointed to a page more immediately relevant to this volcano or should it be removed?
  • ""Cerro Hudson". Global Volcanism Program. Smithsonian Institution." - this is used as a source so it should not be listed as an external link as well
  • "Mount Hudson at AGU" - this external link is a 404 deadlink
  • "Mount Hudson at VolcanoWorld" - I struggle to see how this external link clears the WP:ELNO hurdle
    Eh, removed them all. Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]
  • Is this the best title for this article to be at? It looks like a number of the references use names other than Mount Hudson. A google scholar search (which of course has its limitations) has 794 results for "Cerro Hudson", 989 for "Hudson Volcano", and only 313 for "Mount Hudson"
    I have my doubts, a page move might be in order. Jo-Jo Eumerus (talk) 11:42, 24 March 2024 (UTC)[reply]

That's it for the first read-through. Hog Farm Talk 02:05, 24 March 2024 (UTC)[reply]

Supporting with the understanding that the article titling issue will be revisited after the FAC closes, since it is not recommended to move an article during the FAC process. Hog Farm Talk 01:19, 25 March 2024 (UTC)[reply]

Harry

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Mostly just prose. Haven't checked sources.

—HJ Mitchell | Penny for your thoughts? 19:53, 10 April 2024 (UTC)[reply]

Support. I'm satisfied that my quibbles have been addressed. HJ Mitchell | Penny for your thoughts? 22:33, 22 April 2024 (UTC)[reply]

Support from Gog the Mild

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Recusing to review.

I assumed so. In which case could we say. Perhaps add 'during the past 100,000 years.'
Don't think that works without OR - it tends to be an unstated assumption. Every mountain in the world was once part of a volcano during the Hadean, and yet we don't call them all "volcanoes". Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
I haven't looked at the sources, but currently it is an inaccurate statement. And possibly unsourced(?) Gog the Mild (talk) 15:29, 12 April 2024 (UTC)[reply]
Hrm. Individual Hudson eruptions are often cited among the largest (e.g doi:10.1016/j.earscirev.2013.03.007 for H1 and doi:10.1007/s004450050193 for them in general) Jo-Jo Eumerus (talk) 08:01, 13 April 2024 (UTC)[reply]
I can't find any mentions of specific Hudson eruptions in the first of those. The second has "This eruption, which is considered to be the largest for Hudson and possibly for any volcano in the southern Andes during the Holocene" which does not support your claim.
It's in figure 4 of the first source. Also, the claim is cited in the article, to doi:10.1007/s00410-009-0426-1 and is plausible - Cerro Blanco (volcano) is the only confirmed Holocene VEI7 eruption and there aren't that many VEI6 eruptions in Holocene South America - Michinmahuida, Huaynaputina and Quilotoa are the only other volcanoes cited by GVP. I've changed the lead so that it matches the article. Jo-Jo Eumerus (talk) 08:47, 22 April 2024 (UTC)[reply]
Which is what I requested two weeks ago. Thank you. Gog the Mild (talk) 16:44, 25 April 2024 (UTC)[reply]
  • "Four large eruptions took place 17,300–17,440 (H0), 7,750 BP (H1), 4,200 BP (H2) and in 1991 AD (H3)". Is there a BP missing from after "17,300–17,440"? Add 'in' after "place". Link BP at fist mention. Are "H0" etc the names of the eruptions? If so, say so.
    All done. Jo-Jo Eumerus (talk) 07:25, 11 April 2024 (UTC)[reply]
Nice phrasing.
Ok. What about the other question. "Cerro Hudson" is at the top of the infobox but not mentioned in the lead.
Added it. Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • File:Subduction-en.svg or similar would be helpful at the start of the Geology section.
    Added. Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • "the Tres Montes Fracture Zone to its south that forms the northern boundary of the slab window." This doesn't form a whole sentence. (Or make sense to me.)
    Rewritten. Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • "The subducted plate is still young". Is it known how young? Ie, when did it form?
    Pretty unclear from the sources; In agreement with this geometric model of the plates, the subducted segments of the Chile Ridge at about 6 and 3 Ma would be located close to HV and the surrounding monogenetic cone from Gutierrez 2005 isn't clear on whether that's the age of the plate there. Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • "may be responsible for its unusually high activity." The activity of Hudson, the triple junction or the plate? Ie, what does "its" refer to?
    Clarified. Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • Is it really necessary to have that single sentence paragraph? It looks as if it could run on quite happily from the previous paragraph.
    No, merged it up. Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • "in the late Pleistocene and Holocene ... emplaced during the Cretaceous-Neogene" and any others. Could we be told the age of their ranges at first mention.
    Done. Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • "The Hudson rocks define a potassium-rich" What does "define" mean here? Is there a less specialist way of describing it?
    Went for "are". Jo-Jo Eumerus (talk) 07:33, 12 April 2024 (UTC)[reply]
  • "deglaciation may have enhanced volcanic activity, explaining why the volumes of the intense Hudson eruptions have decreased over time". I don't understand: "deglaciation may have enhanced volcanic activity" means that activity increased, while "the volumes of the intense Hudson eruptions have decreased over time" means it decreased which is it? And why should deglaciation have any effect?
    'cause deglaciation occurred at the beginning of this period. Jo-Jo Eumerus (talk) 08:01, 13 April 2024 (UTC)[reply]
I don't understand the response. Possibly my queries were unclear. They are:
  • Why should deglaciation have any effect on a volcano's activity.
  • In this case did the deglaciation a) enhance volcanic activity or b) decrease the volumes of intense eruptions? On the face of it, these are opposites. If deglaciation caused both - which is what the article claims - I think some level of explanation is necessary; especially regarding the mechanism.
  • Sorry, I meant that if eruptions are enhanced by deglaciation, it's not a contradiction if they decline after deglaciation. The sentence is just a little unfortunate syntactically; I've rewritten it. Jo-Jo Eumerus (talk) 08:47, 22 April 2024 (UTC)[reply]
That is clearer, if still not actually giving any hypothesis as to why deglaciation may have enhanced volcanic activity, but I guess that's optional.
I've added a source discussing a mechanism. Jo-Jo Eumerus (talk) 09:12, 26 April 2024 (UTC)[reply]
"Seismic and fumarolic activity continued for the next months" which is cited to Naranjo et al page 25.
Done. Jo-Jo Eumerus (talk) 08:47, 22 April 2024 (UTC)[reply]
  • "Seismic and fumarolic activity continued for the next months" Given "Durante estos meses no se registró actividad eruptiva, aunque continuó una debil actividadfumarólica" couldn't we be a little more specific?
    According to the page, there were also seismic phenomena in the following months. Jo-Jo Eumerus (talk) 08:01, 13 April 2024 (UTC)[reply]
  • "The largest Holocene eruption of Hudson – and any volcano of the southern Andes". This does not match the lead.
    Changed. Jo-Jo Eumerus (talk) 08:01, 13 April 2024 (UTC)[reply]
Naranjo and Stern have "This eruption, which is considered to be the largest for Hudson and possibly for any volcano in the southern Andes during the Holocene" so there would seem to be disagreement among the sources as to whether it is definitively the largest regional Holocene eruption. The article should reflect this.
Hmm. The problem I see is that this source isn't the only one and gives no specific justification for the "possibly". Certainly, most sources discussing the impacts of volcanism in Patagonia say that H1 was the most significant (not necessarily the largest) volcanic event during the Holocene there and the only comparable eruption (MIC1 of Michinmahuida) has smaller volume estimates. I think the problem is that we don't have any sources that are dedicated to volcano to volcano tephra volume comparisons. Jo-Jo Eumerus (talk) 08:47, 22 April 2024 (UTC)[reply]
Ok. The lead now reads "the second is among the most intense volcanic eruptions in South America during the Holocene." The article obviously needs to match this, so how about 'The largest Holocene eruption of Hudson – which was among the most intense in South America during the Holocene ...' or similar?
Added something like this, but I am not sure that I like the sourcing. Jo-Jo Eumerus (talk) 09:12, 26 April 2024 (UTC)[reply]
  • "trachydacite/trachyrhyolite". The MoS: "Generally, avoid joining two words with a slash". See MOS:SLASH for more details and suggested alternatives.
    Unfortunately, it is not clear from the sources why sometimes trachydacite and sometimes trachyrhyolite. So we can't do without a slashed word here. Jo-Jo Eumerus (talk) 08:01, 13 April 2024 (UTC)[reply]
I think we need to. See MOS:ANDOR. ('which consist mostly of trachydacite, trachyrhyolite or a mixture of the two'?)
No, because the definitions partially overlap and I can't be sure that they aren't referring to the same thing. Jo-Jo Eumerus (talk) 16:52, 13 April 2024 (UTC)[reply]
You can't cite "It appears to consist of two nested calderas" to a source which says (my translation) "two or even three caldera ... two or, possibly, three caldera".
Well, that's interesting. doi:10.1007/s00445-014-0815-9 says that there are two calderas, but cites Orihashi which mentions "two or three". Anyhow, it seems like I was mistaken here; so it now says two or three. Jo-Jo Eumerus (talk) 08:47, 22 April 2024 (UTC)[reply]
  • "Which may be an overestimate." If "yielding more than 20 cubic kilometres (4.8 cu mi)[m] of tephra" is an estimate, could we say so in the text.
    This is another case where sources disagree. My impression is that Bertrand 2014's objection hasn't been picked up widely. Jo-Jo Eumerus (talk) 16:52, 13 April 2024 (UTC)[reply]
If the sources disagree, we need to explicitly say so.
Hence the parenthetical - there is that disagreement, but not enough to put it down as an equal opinion. For example, doi:10.1007/s00445-015-0991-2 knows about Bertrand 2014 and yet uses the Weller estimate. These sources too cite the large estimate despite post-dating Bertrand 2014. I think the objection needs to be mentioned, but it'd be undue weight to say it in text. If there is a better way to present a situation where 1 source has a substantial objection and yet 3-4 keep going with the previous estimate, though, I am listening. Jo-Jo Eumerus (talk) 08:47, 22 April 2024 (UTC)[reply]

That's all from me. Nice work, as always. Gog the Mild (talk) 13:54, 13 April 2024 (UTC)[reply]

  • "The largest Holocene eruption of Hudson – and of any volcano of the southern Andes – took place at Hudson in 7,750". You don't need to say "of Hudson" and "at Hudson". Suggest deleting the latter.
    Done. Jo-Jo Eumerus (talk) 09:12, 26 April 2024 (UTC)[reply]

Volcanoguy

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  • The volcano type for Mount Hudson is inconsistent. In the article, Hudson is described as a caldera but in the infobox stratovolcano is given as the volcano type.
    I hate dealing with infoboxes, fixed. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • I notice throughout the article that Mount Hudson is simply referred to as Hudson. Isn't this a bit informal?
    I've seen plenty of academic articles shortening the name. Besides, as you can see a few sections above, the article will be due a rename after the FAC. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
Introduction
  • "Hudson has the form of a 10 kilometres (6 mi) wide volcanic caldera filled with ice." 10 kilometres (6.2 miles) wide → 10-kilometre-wide (6.2-mile)
  • "covered a large area in Chile and neighbouring Argentina" - would "in" be better replaced with "of"?
    No, because while the area is large, it is not a large portion of Chile. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
Geology
Composition and magma plumbing system
  • "The cone lavas include MORB and ocean island basalt components" - why not spell out MORB (mid-ocean ridge basalt) since it isn't used elsewhere in the article?
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "possible along with the assimilation of crustal material" - should "possible" be "possibly" here?
    Yes, done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "Magmas ascending into Hudson halt at about 6 to 24 kilometres (4 to 15 mi) depth" - this would read better if it were changed to "Magmas ascending into Hudson halt about 6 to 24 kilometres (4 to 15 mi) underground".
  • "and is then stored at a few kilometres depth" - like above, it would read better if it were "and is then stored a few kilometres underground".
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
Climate and vegetation
Eruption history
Holocene
H1 eruption
7,750 BP
H3 eruption
1991 AD
Other historical activity
Hazards

FYI I've nominated the Big Raven Formation article for FA. Volcanoguy 20:16, 12 April 2024 (UTC)[reply]

Source review

Will pick this up shortly. - SchroCat (talk) 06:12, 13 May 2024 (UTC)[reply]

  • Spot checks not done
  • You've got some shouty caps at 67
  • Your capitalisation goes a little awry in places. Most seem to follow the format of Barr et al and are in sentence case, for example, while Garvey, Koffman, Lachowycz (and a few others) all capitalise each first letter
    Mm, not sure what capitalization you are speaking of - the sfn template does truncate long author lists at 3. Jo-Jo Eumerus (talk) 06:39, 14 May 2024 (UTC)[reply]
    Sorry, I think I must have phrased it clumsily. I'm talking about the capitalisation of the titles. So, for example, most of the journals or papers follow the sentence case format you use with Fernández et al: i.e. "Relationships between terrestrial animal exploitation", but for the following, there is a different form of capitalisation used:
    Garvey et al, the title capitalises each word: "Prehistoric Human Occupation of Southern Andean Forests"
    Ditto for Koffman et al: "Abrupt Changes in Atmospheric Circulation During the..."
    Ditto for Lachowycz et all: "Revision of the Post-Glacial Explosive Eruption History"
    Ditto for Stern
    These should be in the same format as the others. Cheers - SchroCat (talk) 08:55, 14 May 2024 (UTC)[reply]
    Ah, I get it now. That's because the sources themselves use the unusual capitalization - "Prehistoric Human Occupation of Southern Andean Forests: Evidence from Alero Largo, Aysén, Chilean Patagonia" for doi:10.1017/laq.2022.18 Jo-Jo Eumerus (talk) 10:13, 14 May 2024 (UTC)[reply]
    I think consistency trumps the original formatting as far as FAC goes, so as we're not changing the meaning to anything, it's best to make the capitalisation consistent. Cheers - SchroCat (talk) 11:05, 14 May 2024 (UTC)[reply]
    Mm, not sure that changing the capitalization of sources is part of the consistency requirements of FAC, except for fixing allcaps titles. Jo-Jo Eumerus (talk) 16:23, 14 May 2024 (UTC)[reply]
    I'm fairly sure it is (I've been picked up on it enough times when I've inadvertently mixed up the style): This guidance says "Sourcing information should be presented in a consistent and uniform style"; that generally means that each type of source must be consistently formatted (ie. all books formatted similarly, all journals formatted similarly, etc). We can always drop a question on FAC talk to get outside input, if you want? Cheers - SchroCat (talk) 16:31, 14 May 2024 (UTC)[reply]
    @SchroCat: Done Jo-Jo Eumerus (talk) 07:55, 15 May 2024 (UTC)[reply]
    Since most of the comments appear to endorse the changes, I've implemented them. Jo-Jo Eumerus (talk) 14:54, 15 May 2024 (UTC)[reply]
  • Aside from that, the formatting is consistent
  • Just checking, is the name Mateo, Mateo correct?
    Seems like, yes. Jo-Jo Eumerus (talk) 06:39, 14 May 2024 (UTC)[reply]
  • Wider searches for additional sources show no missing sources (with the caveat that I am a generalist, with no specialist knowledge of the subject)

That's my lot. – SchroCat (talk) 12:50, 13 May 2024 (UTC)[reply]

@SchroCat is the source review a pass from you? Der Wohltemperierte Fuchs talk 13:37, 15 May 2024 (UTC)[reply]
Hi David, not yet. There's the question of the consistency of capitals in the sources. Do you have a view on the point? Cheers - SchroCat (talk) 13:45, 15 May 2024 (UTC)[reply]
@SchroCat I've always tried to match them personally, and I generally agree with the guidance. WP doesn't care what type of consistency you use with referencing as long as it is consistent. Der Wohltemperierte Fuchs talk 13:59, 15 May 2024 (UTC)[reply]
Thanks - that was my impression too. - SchroCat (talk) 14:16, 15 May 2024 (UTC)[reply]
The above discussion is preserved as an archive. Please do not modify it. No further edits should be made to this page.
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