Talk:Croscat

Confusing sentence

"Després aquest volcà fou explotat com a pedrera d'aquí el seu estat actual. Aquest volcà, estigué durant 25 anys dedicat a l'explotació de greda."

In the 1960s the Croscat cone became a source of volcanic gravel of the lapilli size, locally known as greda.[1]

The Català Wikipedia says that it was quarried for greda, which is supposedly a local name for clay. The English Wikipedia says it was quarried for gravel of lapilli type (redundant, and lapilli is a size, not a type), known locally as greda, the word, according to ca.wikipedia for a pyroclastic clay, which, by the way, cannot be of lapilli size, unless they're aggregates, which they may be as volcanic ejecta.

I attempted some correction, and was directed by the author to an article that appears to be discussing layers of lapilli, slag, and bombs. The slag could be scoria, and this is a Strombolian type volcano, and scoria is quite commonly quarried for landscaping gravel.t

I doubt the accuracy of the article. 68.107.141.42 (talk) 02:13, 24 March 2012 (UTC)

First of all I would like to apologize because I didn't see you did an edit before I added the reference. As surprising as it may seem, I only saw the edit by User:Helpful Pixie Bot and I assumed that the bot had somehow detected that there was a sentence without a reference and added the citation template. I should have noticed your edit as I also found it strange that I had used the word 'size' instead of 'type', which is the wording I had in mind. My mistake.

Although my geology knowledge is poor, I believe you are right about the terminology. Even the reference I added makes it clear that greda and lapilli are the same thing:

• "grederes (as the lapilli or greda mines are called in the comarca)".

The dictionary of the Institut d'Estudis Catalans gives lapilli (Catalan: lapil·li) as the second entry of the word greda: link.

• Lapilli: "Material of volcanic projection formed by piroclasts 2 to 30 millimiters, or from 2 to 64 millimiters in size, depending on which grading is adopted."

A proposal for this sentence: "Starting from the 1960s the eastern flank of the volcano was quarried for lapilli." ? ref: pag22.

That said, given the fact that most of the sources are not in English and I that I had made a mistake that may put into doubt the accuracy of the article, maybe it would be better to remove the DYK nomination. I understand that it might be difficult for English speakers to check the accuracy of the sources (especially considering that some references are not just in Spanish, but also in Catalan). And when I added a reference for the sentence that is being discussed, I had to remove another sentence without a source.

Anyway, thanks for the comment and I'll try to be more careful with my wording next time. As soon as I can, I'll double-check that each sentence is supported by the references given.Drunt (talk) 13:38, 24 March 2012 (UTC)

Maybe you can use the protestations about continuing the quarrying for the DYK hook? I think just quarrying for lapilli gravel is fine. I think, looking through the Catalan articles, that this was a case of bad transfer of information from one of the original sources. I do not read Catalan, but I am a researcher in natural history translations, and this is something we see commonly, when scientific information is on a rare topic (pyroclastic clays), then must be transferred to the lay public. Thank you for replying. I am having problems with biology editors in DYK, and I thought you were doing the same thing. I apologize for being snappy. 68.107.141.42 (talk) 16:37, 24 March 2012 (UTC)

Ok, I'll add a hook for the quarry. Your feedback was useful because by making sure that each sentence was correct, I realized that recent developments may have rendered some of the information inaccurate or incomplete, even if the source is reliable. It seems the recent studies consider that a lava field produced by the eruption 17000 years ago may have been the result of another volcano (pag19,pag6). Given that I can't be sure I've interpreted this information correctly and that I can't verify what is the current consensus about the eruptions, I've decided to remove the section. Drunt (talk) 18:36, 24 March 2012 (UTC)

By the way, in the first paragraph of the Geology section there are a few words on the risk of another eruption in the Garrotxa Volcanic Zone. Initially, I wanted to include a sentence before this one that would have said "The Croscat volcano is part of the Garrotxa Volcanic Zone, which is considered dormant but not extinct." but then I found an article claiming that:

• "The volcanic area of ​​Garrotxa has been considered dormant, not extinct, until recently. Now, experts have determined that it is wrong to say that charge, but is considered active, and within this classification, the risk to re-erupt is moderate."

I pondered whether I should have used The Croscat volcano is part of the Garrotxa Volcanic Zone, which is considered active with a moderate risk of another eruption. but to say that this volcano is active might have raised some eyebrows. I wonder if the part about the risk of another eruption in the area should be removed (maybe it would be more appropiate for the article of Garrotxa Volcanic Zone. Drunt (talk) 13:47, 24 March 2012 (UTC)

I think that volcano articles should include eruptive risk. However, en.Wikipedia has excellent writers in this area, and I think you might ask at the Wikipedia Project Volcano page for someone to guide you in writing this part. 68.107.141.42 (talk) 16:37, 24 March 2012 (UTC)

I've just removed the section (see above) but I'll ask them to see if I get any feedback about the article. Drunt (talk) 18:36, 24 March 2012 (UTC)

References for the hook

Just in case somebody wants to check the DYK nomination hook: the youngest volcano in the Iberian Peninsula,

• pag4: being the Croscat volcano with an age of 11,500 years, the last eruptive activity throughout the region and in the Iberian Peninsula." ([essent el volcà del Croscat amb una edat de 11.500 anys, el darrer que va tenir activitat eruptiva en tota la zona i la península Ibèrica.] Error: {{Lang-xx}}: text has italic markup (help))
• "the youngest volcano of the Garrotxa Volcanic Field and of the whole Iberian Peninsula (11 ka; Guérin et al., 1985)"

The quarrying part of the hook:

• pag 62: Until 1991, a historic year for several reasons. First, because on the 10th May of that year the extraction of clay from volcano Croscat were definitely suspended. - [Fins que va arribar el 1991, un any històric per diverses raons. En primer lloc perquè el 10 de maig d’aquell any es van suspendre, definitivament, les extraccions de greda del volcà del Croscat.] Error: {{Lang-xx}}: text has italic markup (help)

I didn't mention that it is the highest volcano in the hook but this reference explains it:

• pag5. This is the highest volcano of the peninsula, 160 meters of relative height. - ([Es tracta del volcà més alt de la península amb 160 metres d’alçada relativa.] Error: {{Lang-xx}}: text has italic markup (help))

By the way, the journals that I included as references are available online (it seems the articles have been uploaded by the authors):

• Changing eruptive styles in basaltic explosive volcanism: Examples from Croscat complex scoria cone, Garrotxa Volcanic Field (the height of the volcano, 189 m, comes from this reference)
• Complex interaction between Strombolian and phreatomagmatic eruptions in the Quaternary monogenetic volcanism of the Catalan Volcanic Zone

Don't hesitate to ask for more information/translations from the references. Drunt (talk) 16:50, 1 April 2012 (UTC)