Talk:Large igneous province

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[edit] Question

How long would it take for a large igneous province to cool?

Obviously the initial temperature, depth, and composition all play key roles.

"Individual lava flows may take tens to hundreds of years, depending on thickness. Keep in mind that perhaps 90% of the magma generated may remain deep within the crust as intrusions, which will keep the crust hot for a long time. Geodoc 05:38, 28 January 2007 (UTC)

[edit] Northern Cordilleran volcanic province

Should Northern Cordilleran volcanic province be listed on this page? Nothing there seems to suggest that it is a Large igneous province. --Burntnickel 16:35, 7 August 2006 (UTC)

No, i have removed it. Good call. Geodoc 05:34, 28 January 2007 (UTC)

It's back. I rather doubt it should be here unless someone can point to publications that suggest there's some consensus (that I'm as yet unaware of) where this is considered a LIP. I think examples should be limited to cases where there's broad consensus in the scientific community of the feature's status as a LIP. Of course it doesn't help that LIPs are rather crudely defined. —The preceding unsigned comment was added by 69.9.146.66 (talk • contribs).

You're right. I've removed it. -- Avenue 13:43, 22 May 2007 (UTC)
I also removed all mention of "large igneous province" from Northern Cordilleran Volcanic Province, since no reference I can find would support that claim. In fact, Wikipedia was the only place I could find such a claim was being made. --Seattle Skier (talk) 18:14, 22 May 2007 (UTC)

[edit] Difficult to follow

This article is really interesting, but it is difficult for a layman (like me) to follow. I feel the language could be made more accessible.

John W.

Can you give some specific examples of language thats hard to follow? I have tried to avoid jargon in my edits, but there may be some from previous edits. Its a little hard to know what is difficult for non-specialists when you are a specialist. Thanks!
PS: Try following some of the links too, that wll give a broader picture of different aspects. The LIPS website has some great graphics - i will see if any can be reproduced here. Geodoc 06:06, 1 February 2007 (UTC)
Some strange notation that I haven't seen anywhere (introduced at this point):
examples are the Deccan traps:end Cretaceous extinction event
What are these end for, especially when used without spacing? And in general, is it valid English? --saimhe 15:35, 5 June 2007 (UTC)

Also, "Permian Emeishan Large Igneous Province" link on this page goes to "Mt Emri" or something. I was expecting to find that the Permian Emeishan LIP was related to the Siberian traps (or at least coincident in time).

Thanks for your time. John W.

—The preceding unsigned comment was added by 72.83.232.158 (talk) 13:11, 31 January 2007 (UTC).

Yes, this is peculiar. Apparently, Mt Emi is near all that basalt. According to LIPS database, Emeishan (258 million years) is slightly older than Siberian traps (249-251). But there is published age of 251 on Emeishan also, so they could be equivalent. Geodoc 06:17, 1 February 2007 (UTC)

[edit] More LIPS?

Hi. Is there a large igneous province in Western USA, surrounding Yellowstone, Long Valley, Valle Grande, La Garita, and Bruneau-Jarbidge? Thanks. AstroHurricane001(Talk+Contribs+Ubx) 21:57, 9 February 2007 (UTC)

The Bruneau-Jarbidge eruptive center is an early (10-12 mya) element of the track of the Yellowstone Hot Spot. Yellowstone (0-2 mya) itself is (coincidentally) today at the location where, 50 million years ago, the Absaroka Volcanics were erupted. Long Valley Caldera is perhaps related to the boundary zone between the Basin and Range province and the Sierra Nevada, but as far as I know its ultimate origin (dating to about 750,000 yrs) is not clear. Valle Grande (Jemez Caldera) is related to a regional weak zone transecting the Rio Grande Rift and the edge of thick crust on the southeast side of the Colorado Plateau; it dates to 1-1.4 mya. La Garita Caldera is part of the San Juan Volcanics, erupted about 28 million years ago. Like Jemez, La Garita and the San Juan Volcanics are probably somehow related to the flanks of the thick crust of the Colorado Plateau, this time on the NE side but at a different time. A similar volcanic pile that you did not mention is found on the NW flank of the plateau, comprising the Marysvale Volcanics of SW Utah, dating to about 24 million years ago.
The features you name are not related directly to each other (especially not in time or space, but in many cases also not in genesis) and don’t fit the definition of Large Igneous Provinces as defined (correctly) in the article. The features are all isolated from each other by dramatically different geologic and tectonic provinces. Hope this helps. Cheers Geologyguy 22:15, 9 February 2007 (UTC)