Talk:Shield (geology)
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[edit] Article title
Articles title should be "Shield (geology)". It's geological, not geographical term. Definition is also bad. It's absolutely not important whether the shield is in the middle of the continent or not. Important is that shield is extended area, where crystalline rocks of continental plates basement are outcropping. Siim 17:57, 7 August 2005 (UTC)
[edit] Basement
I noticed that Zyzzy removed word "basement", but it was important in this article. It should be replaced with something else if this term is not preferred (I don't know exactly because English isn't my native language). Shield is large area of exposed crystalline rocks but these crystalline rocks have to be the layer of continental crust which is usually under sedimentary cover (mainly metamorphic with igneous plutons). It can't be rocks of large igneous provinces or volcanic rocks or something else. So please put this word back or replace it with something appropriate to make sure that for instance volcanic field is not a shield. Siim 19:59, 8 August 2005 (UTC)
- Although basement rock may be a craton, it does not have to be. (SEWilco 20:14, 8 August 2005 (UTC))
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- It just means that we have to add word "craton" to the definition. According to current definition, even mountain ranges are shields. Isn't it so? Siim 20:33, 8 August 2005 (UTC)
[edit] Definition
One more thing. I separated definition from rest of the article, but Zyzzy changed it and put everything together again. Why shouldn't definition be separated? Siim 08:15, 9 August 2005 (UTC)
[edit] Move to Shield (geology)
A move to the more correct name "Shield (geology)" is under way. There will be a brief delay while the remains of an improper cut-and-paste move are cleaned up. (SEWilco 18:59, 20 October 2005 (UTC))
[edit] List of Shieds?
Shouldn't we have a list of shields? I feel we're missing some here, namely the Guiana shield, since we're only naming "the Canadian Shield, Baltic Shield, and the Arabian-Nubian Shield." I know it is just a stub right now, but we need to start somewhere, don't you think?
On a related note, what exactly is the differance between a shield and a Canton?--Once in a Blue Moon 22:02, 26 August 2006 (UTC)
- I think a shield is exposed bedrock which is part of a craton. Most cratons are buried, but have been exposed in some places. (SEWilco 02:25, 27 August 2006 (UTC))
