Talk:Igneous rock

From Wikipedia, the free encyclopedia

This article incorporates text from the Encyclopædia Britannica Eleventh Edition, now in the public domain.


Earth sciences Portal
Igneous rock is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
B This article has been rated as B-class on the quality scale.
High This article has been rated as High-importance on the importance scale.
WikiProject Volcanoes

This article is part of WikiProject Volcanoes, a project to systematically present information on volcanoes, volcanology, igneous petrology, and related subjects. If you would like to participate, you can choose to edit the article attached to this page (see Wikipedia:Contributing FAQ for more information), or join by visiting the project page.
B This article has been rated as B-Class on the quality scale.
Top This article has been rated as Top-importance to WikiProject Volcanoes on the project's importance scale.
If you have rated this article please consider adding assessment comments.
This article has been reviewed by the Version 1.0 Editorial Team.

Contents

[edit] Dike

Can someone help me out with the geological definition of dike at dike? Extend it to a dike (geology) page if you like... Thanks. dave 17:19 16 Jul 2003 (UTC)

Done - or at least started. Dike (geology) --Vsmith 03:19, 11 Sep 2004 (UTC)

The part on classification is pretty inadquate. Without having to totally rip off something else, we should at least either a) move it to a new page such as Igneous rock classification and give it a good go, or at least condense the wisdom in the first part of this. For instance, the current spiel focuses on poor but serviceable definitions of igneous rocks based entirely on whether they are felsic or mafic, without giving any regard to the chemistry (except the TAS diagram, which is a last resort anyway).
For instance there is no way to get stuck into the taxonomy of rocks in an organised manner, such as in that flowchart. There are principles to the taxonomy of igneous rocks after all. Even taking aside the fact it's a human endeavor, there are some rocks such as alkaline basalts, peralkaline and ultrapotassic rocks which are distinct solely because of their mechanism of melting - for instance thermal divides, etc. created by partial melting mechanisms. And there's the lack of a definition between calc-alkaline and tholeiitic. Rolinator 05:25, 28 December 2005 (UTC)

[edit] Citations

Be nice to see some citations for estimated temperature ranges of magma.

Thangalin 01:40, 23 October 2006 (PST)

[edit] B class

Well written article, but I'm reluctant to give it better than a B class rating for "WikiProject Geology" until the references are actually cited in the text so we can see where statements came from. --Zamphuor 15:52, 22 April 2007 (UTC)

Nice job. yesterday I added 2 sentences on the extrusive and intrusive igneous rocks. Glad to see someone worked on it. —Preceding unsigned comment added by Jwebbxsjado (talk • contribs) 14:29, 25 September 2007 (UTC)

[edit] Vandalism

I'm a casual user that noticed some vandalism on the page. I'm going to remove it, but I noticed in the history that this page has had a fair amount of vandalism for some strange reason. Someone a bit more saavy with the workings of Wikipedia might want to do something about it. —Preceding unsigned comment added by 71.111.248.218 (talk) 16:00, 20 October 2007 (UTC)

[edit] Porphyritic classification

Something along the lines of:
Porphyritic rocks are classified as either phaneritic or aphanitic according to the groundmass' texture. Further refinement to the classification is made by adding the adjectives porphyritic or porphyry to the name (i.e. porphyritic andesite or andesite porphyry.)
should be added to either this page or the pages on porphyry and porphyritic texture. Zappa2496 (talk) 07:28, 21 April 2008 (UTC)