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Mount Hudson[edit]

Mount Hudson (edit | talk | history | links | watch | logs)

As of 5 May 2024, 08:28 (UTC), this page is active and open for discussion. An FAC coordinator will be responsible for closing the nomination.
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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[edit]

  • 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[edit]

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[edit]

Mostly just prose. Haven't checked sources.

  • Check for duplicate links throughout.
    Done. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • Are we using BCE/CE or BC/AD? It doesn't really matter but you should be consistent.
    Done. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • Some terms might benefit from an explanatory gloss (eg "lahar")
    Done, but I'm afraid that I am not that great at spotting technical terms that require explanation. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • which is technically the correct name of the volcano as "Hudson" is the name of a different mountain. Huh? That caught me by surprise a bit. I feel some elaboration is needed.
    I have moved it down to a footnote. I don't know of any map of local toponyms from that time and it's just one source. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • Do we know how its volcanicness if that's not a word it should be! was discovered? Your footnote says there was an unpublished report in 1970 but doesn't mention the method of discovery.
    Sans access to the unpublished report, we can't. I figure that geologists went there and noted that the structure was a caldera, one year before the eruption. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • With more than 55 eruptions during the past 22,000 years,[40] Mount Hudson is the most active volcano in Patagonia I don't think that's a strictly grammatical use of "with"
    Is the reformulation better? Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • Likewise The tephra was emplaced northeastward, with thicknesses exceeding 50 centimetres (20 in) which is what Tony calls Noun plus -ing.
    Rewritten. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • and was preceded by increasing hydrothermal activity.[174] It was preceded by several days Repetition of "preceded" and generally repetitive sentence structure; can the sentences be merged?
    Done. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • It began on October 26 What did? The eruption or the earthquake activity? Could be read as either.
    Clarified. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • Three vents formed in the southern sector of the caldera, with ash columns rising see above about noun plus-ing
    Rewritten. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • However, as of 2023 the municipal planning of the municipalities on the Chilean side close to the volcano largely ignores volcanic hazards. "however" is a word to watch because it's often editorialising (as it is here); repetition of "municipal".
    Removed the however, but I am not sure what to replace the first municipal with. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]
  • Is there much to say on its proximity to other volcanoes or their relative activity levels in relation to each other?
    Not really much beyond what's currently there - Hudson is the most active volcano in the area, and only Lautaro has unambiguous historical activity. Jo-Jo Eumerus (talk) 07:15, 11 April 2024 (UTC)[reply]

—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[edit]

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.
  • "The volcano has the form of ..." Name it in full, the last volcano mentioned was "south of Hudson is a smaller volcano".
    Done. Jo-Jo Eumerus (talk) 07:25, 11 April 2024 (UTC)[reply]
  • Only one image? Are there no other free use images available?
    Not that many, as the volcano is so remote; commons:Category:Cerro Hudson is pretty empty. Jo-Jo Eumerus (talk) 07:25, 11 April 2024 (UTC)[reply]
    I think File:Map chile volcanoes.gif could be used in this article. Volcanoguy 14:04, 13 April 2024 (UTC)[reply]
    Hudson's GVP entry also has USGS photos that could be uploaded on Commons to use in this article. Volcanoguy 16:26, 13 April 2024 (UTC)[reply]
    Regarding File:Map chile volcanoes.gif, possibly, but I wonder what the inclusion criteria are. Put one other image in. Jo-Jo Eumerus (talk) 16:52, 13 April 2024 (UTC)[reply]
    File:TOMS SO2 time nov03.png could be used in the 1991 eruption section. The caption could be something like "1991 eruption sulfur dioxide emission levels compared with other volcano eruptions from 1979 to 2003". Volcanoguy 18:29, 13 April 2024 (UTC)[reply]
    Hmm. Currently there is not much discussion of sulfur and Hudson in the article. I don't think this volcano is considered a major sulfur source. Jo-Jo Eumerus (talk) 06:41, 14 April 2024 (UTC)[reply]
  • "accessed either from the sea through the Huemules River". I don't think you mean "through" the river.
  • "or by land through the Blanco River". Likewise.
    Done and done. Jo-Jo Eumerus (talk) 07:25, 11 April 2024 (UTC)[reply]
  • "covers an area of about 300 kilometres (190 mi)". Should that be square kilometres?
  • "and covers an area of about 300 kilometres (190 mi) ... and it covers an area of about 300 square kilometres (120 sq mi)." Duplication?
    Merged the previous sentence, as the information was duplicated. Jo-Jo Eumerus (talk) 07:25, 11 April 2024 (UTC)[reply]
  • "including the Cerros Hudson 12 kilometres (7.5 mi) south of the volcano". I thought Cerros Hudson was another name for Mount Hudson.
  • The top of the infobox has "Cerro Hudson". Is this the same as Cerros Hudson, and why is this name not mentioned in the lead?
    No, Cerros is a plural form of Cerro, not the same name. Jo-Jo Eumerus (talk) 07:25, 11 April 2024 (UTC)[reply]
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]
  • "The 1991 Plinian eruption was larger than the 1971 event". This seems a strange way to introduce H3, when a reader has not been told anything about the 1971 event - and so the 1991 event being larger does not mean anything.
    Recasted it. Jo-Jo Eumerus (talk) 08:01, 13 April 2024 (UTC)[reply]
  • The H3 event should have the date it occurred in the first sentence about it.
    Done. Jo-Jo Eumerus (talk) 08:01, 13 April 2024 (UTC)[reply]
  • Cite 131: should it not be to page 27 as well as 25?
    Cite 131 currently contains page 9, did it shift in the meantime. Jo-Jo Eumerus (talk) 08:01, 13 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]
  • "while (subglacial) lava flows". I suggest removing the parentheses.
    Done. Jo-Jo Eumerus (talk) 16:52, 13 April 2024 (UTC)[reply]
  • "About 84,000 people live around Hudson." If we also cite page 40, can we be more precise and say 'About 84,000 people live within 50 km of Hudson'?
    We can, I guess. Done. Jo-Jo Eumerus (talk) 16:52, 13 April 2024 (UTC)[reply]
  • "It appears to consist of two nested calderas." The source says (my translation) "two or even three".
    My impression is that most other sources only credit Hudson with one or two calderas, and the more detailed ones on the local structure prefer two. 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[edit]

  • 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
  • "Hudson rises from the Patagonian Batholith, a 1,000-kilometre (600 mi) long formation" - formation (geology) redirects to geological formation which is about stratigraphy rather than intrusions.
    The Patagonian Batholith is also a stratigraphic formation. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
    I haven't been able to find any sources describing it as such. Volcanoguy 17:34, 13 April 2024 (UTC)[reply]
    You also checked Spanish ones? One would expect that these intrusions (which are grouped together as an unit) being called in a certain way. Jo-Jo Eumerus (talk) 17:58, 13 April 2024 (UTC)[reply]
  • "including the Liquine-Ofqui Fault Zone (LOFZ) that runs parallel to the volcanic belt" - I think "that" should be "which" here.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
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
  • "Winds usually blow from the north or northwest and are strong, easterly winds are rare." Should the comma in this sentence be a semicolon instead?
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
Eruption history
  • "has yielded ages of 120,000-100,000 years" - en dash.
  • "from the Pleistocene-Holocene transition time" - en dash.
    Done and done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
Holocene
  • "erupted rocks have grown less mafic" - I think you mean the rocks have become less mafic; rocks don't "grow".
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "Having erupted 55 time during the past 22,000 years" - time should be times.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • Why do some tephra layers in the table have footnotes while others don't? The dates appear to be missing sources completely.
    'cause some of them are sourced in the column header. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
H1 eruption
7,750 BP
  • "The tephra deposits have three layers," - I think this comma should be a semicolon.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
H3 eruption
1991 AD
  • "a phreatomagmatic eruption commenced on August 8 at 18:20" - 18:20 UTC?
    Source does not specify; I figure it's Atlantic Time Zone though as that's Chile's timezone. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "entered a trachyandesitic reservoir at 2 to 3 kilometres (1.2 to 1.9 mi) depth" - this would read better as "entered a trachyandesitic reservoir 2 to 3 kilometres (1.2 to 1.9 mi) underground".
    Eh, I think in this case the first formulation works. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "Part of the ice cap melted." - this sentence would be better off as part of the previous sentence using a semicolon.
    Not sure that it is germane to that sentence, though. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "tephra fell along two axes: A narrow northern one" - the "A" doesn't need to be capitalized here does it?
    I think it should, after a colon. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "the southeastern one by the Plinian one" - I would replace "Plinian one" with "Plinian phase" to avoid repetition.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
Other historical activity
  • "On the morning of August 12, 1971 tremors" - missing a comma after 1971.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "between 0 to 10 kilometres (0 to 6 mi) depth" - I would use "underground" instead of "depth" here.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
Hazards
  • "the highest hazards exist in the Huemules and Sorpresas valley" - I think valley should be plural.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]
  • "As of 2023 the municipal planning of the municipalities" - comma after 2023.
    Done. Jo-Jo Eumerus (talk) 08:12, 13 April 2024 (UTC)[reply]

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

  • SC - a marker for now. - SchroCat (talk) 07:38, 21 April 2024 (UTC)[reply]
  • Just the one comment from me: ”and Holocene[b],”: why is the note before the punctuation? - SchroCat (talk) 06:34, 5 May 2024 (UTC)[reply]
    'cause it refers only to the word, not the entire sentence. It's a style thing I have invented for when I am using footnotes to explain a word and citations to source content, as a way to distinguish between the two. Jo-Jo Eumerus (talk) 07:09, 5 May 2024 (UTC)[reply]
    Can I suggest it goes after the punctuation, per the MOS? There's no guideline that suggests this is an accepted practice, it's not clear what the intent is from the text, and the day this does up as TFA, it'll be corrected to the more accepted version straight away. - SchroCat (talk) 07:37, 5 May 2024 (UTC)[reply]
    Done. Jo-Jo Eumerus (talk) 08:00, 5 May 2024 (UTC)[reply]
  • Support Nice piece of work - enjoyable read. - SchroCat (talk) 08:28, 5 May 2024 (UTC)[reply]
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