Talk:Igneous rock

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[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)