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Though well-written I rated this article only "B" for the "WikiProject Geology" assessment because of the severe lack of references. The only reference (apart from a few external links) is to the 1910-11 public domain version of Encyclopedia Britannica; I think the science of metamorphic geology might have moved on just a little since then. --Zamphuor 15:35, 22 April 2007 (UTC)
Hey, what about this idea of the mica or phyllosilicates realigning themselves mechanically within metamorphic rock. I bet it is way more complicated than that. Reference Please! Has any experimental geologist done this in a lab? In addition, styolites caused from pressure solution are very common in marble can be argued as an erratic foliation since they can be composed of carbon, iron oxide, or phyllosilicates. This is based on field experience within several Nevada mines. Here is the only link I could find on the subject. http://erictwelker.com/pressuresolution.htm I am too busy to research this for the next year. — Preceding unsigned comment added by 188.8.131.52 (talk) 21:45, 3 July 2014 (UTC)
The last sentence of the introduction of the article gives some specific examples of metamorphic rocks. You have probably even heard of some of them. But you can also click on their and read details (including uses) of them. DMacks (talk) 17:26, 21 September 2009 (UTC)