Talk:Vilama (caldera)

GA Review

This review is transcluded from Talk:Vilama (caldera)/GA1. The edit link for this section can be used to add comments to the review.

Reviewer: Ceranthor (talk · contribs) 20:30, 16 June 2018 (UTC)

I'll be reviewing this over the next few days. ceranthor 20:30, 16 June 2018 (UTC)

Lead

• "Vilama is a Miocene caldera in Bolivia and Argentina. " - I think it's better to introduce the Miocene age slightly later, not in the first sentence. I'd also add "epoch" after Miocene
• "one of the four volcanic belts in the Andes." - should probably briefly clarify what the Andes are for someone unfamiliar with South American geography
• "Vilama is a remote caldera and part of the Altiplano-Puna volcanic complex" - I'd just say "Vilama is remote" since a "remote caldera" sounds like a jargon term; I would add "forms" before "part" to introduce the active voice
• "15–18 kilometres (9.3–11.2 mi)-35–40 kilometres (22–25 mi)" - easier to read as between the two ranges
• "buried beneath younger volcanoes that have in part grown along the margin of the caldera" - I don't think "in part" adds anything
• "volcanic activity on these continued into the Pleistocene" - I'd be more precise in referring to the volcanoes than "on these"
• "Another large ignimbrite, the Sifon ignimbrite, may also have been erupted by Vilama, while the Granada ignimbrite was later attributed to a separate volcano." - if the Granada ignimbrite wasn't erupted by Vilama, it's probably not worth mentioning in the lead here

I was working off Calabozos where the age is mentioned upfront. Added a link for Andes. To my understanding Granada was formerly attributed to Vilama, so clearing that up upfront seemed reasonable to me. Jo-Jo Eumerus (talk, contributions) 06:33, 19 June 2018 (UTC)

Geography and geomorphology

• "The Vilama caldera lies on the border between Argentina and Bolivia in the Puna-Altiplano, a high plateau in the Central Andes.[2] " - again, I'd briefly clarify what the Andes are
• "The volcano straddles the border between Bolivia and Argentina, northeast of Cerro Zapaleri and the tripoint between Argentina, Bolivia and Chile there.[3]" - are you trying to say the volcano lies to the northeast, and that it marks the tripoint? If so, it's not totally clear; I'd reword or split into two sentences.
• "The Central Volcanic Zone is home to over a thousand " - more than, not over
• "of which 44 were active after glacial times" - after glacial times? what does this mean?
• "and frequently reach heights of over 6,000 metres (20,000 ft).[7] " - above or more than, not over
• "about 15–18 kilometres (9.3–11.2 mi)-35–40 kilometres (22–25 mi) wide" - same note as in the lead about between
• "with the exception of a 250–400 metres (820–1,310 ft) high" - need a |adj=on
• "The caldera contains a 30 by 10 kilometres (18.6 mi × 6.2 mi) large[8]" - need a |adj=on
• "surrounded by a 400–800 metres (1,300–2,600 ft) deep moat" - need a |adj=on
• "The caldera was at first considered to be 40 by 65 kilometres (25 mi × 40 mi) large" - rather than "large", I'd put "in width"
• "the 20 by 40 kilometres (12 mi × 25 mi) Coruto caldera" - need a |adj=on

"Glacial times" is a term used to describe the last glaciation, which typically means the last glacial maximum. Jo-Jo Eumerus (talk, contributions) 06:33, 19 June 2018 (UTC)

Geology

• link tripoint at its first mention rather than in this section
• dacite is linked more than once
• "During the 8-4 million years interval" - do you mean the interval from 8 to 4 million years ago? That phrasing would be more clear
• Pleistocene is linked more than once, as is Miocene
• " 9.7-9.8 million years old" - think this needs an ENDASH rather than a hyphen

Climate and vegetation

• Mostly looks good. Maybe could be consolidated into one paragraph?
• Any examples of mammals?

I don't think there is any information on mammals specifically for this area. Jo-Jo Eumerus (talk, contributions) 06:33, 19 June 2018 (UTC)

Eruption history

• "which covers a surface of over 4,000 square kilometers" - more than, not over
• " 8.4 - 8.5 million years ago" - needs an ENDASH
• "1–50 metres (3 ft 3 in–164 ft 1 in) thick" - need a |adj=on here
• "with a volcanic explosivity index of over 8" - greater than or more than, not over
• "Vilama caldera thus a supervolcano.[18]" - I'd add another verb here for readability
• " 5-8.1 ± 0.6 million year old" - need an ENDASH
• "6-8.4 ± 0.6 million year old eastern centers (" - same as above

References

• reliable.
• Ref 4 should be lowercase for its title for consistency
• Same with the Coira source in the sources section

I think I got all the issues not noted here. Jo-Jo Eumerus (talk, contributions) 06:33, 19 June 2018 (UTC)

Good work. Just some prose nitpicks to fix, but this looks great. ceranthor 22:59, 18 June 2018 (UTC)

After checking with Earwig's tool, I'm satisfied with the fixes/justifications. Passing now. ceranthor 21:57, 19 June 2018 (UTC)