Talk:Metamorphic rock

message: I moved back the setence about metamorphism to metamorphism, ie, undoing redirect, because i intend to write a proper article about that.
What is missing? Facies and textures. Muriel Gottrop 15:14, 1 Aug 2003 (UTC)
thread_title: Untitled

message: 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)
replies: text: Checked and reference added. Vsmith (talk) 00:48, 12 February 2008 (UTC)
thread_title: B Rating

message: What is metamorphic rock used for? —Preceding unsigned comment added by 81.156.176.218 (talk) 
: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)
thread_title:  Why? 

message: Do you think this chart would be proper for the page?
http://commons.wikimedia.org/wiki/File:Metamorphic_Rock_Chart.PNG
There is also one for sedimentary and igneous. Andrew Colvin (talk) 00:46, 4 January 2010 (UTC)
thread_title:  Classification Chart 

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— Gorthian (talk) 03:13, 28 February 2016 (UTC)
replies: text: I found an earlier version of the link that works. — Gorthian (talk) 03:19, 28 February 2016 (UTC)
thread_title:  External links modified 

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thread_title:  External links modified (January 2018) 

message: Cwsprag (talk) 21:51, 10 December 2018 (UTC)
replies: text: Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. DannyS712 (talk) 22:28, 10 December 2018 (UTC)
thread_title:  Semi-protected edit request on 10 December 2018 

message: basalt is metamorophic and is a rock 51.37.43.200 (talk) 07:25, 26 November 2019 (UTC)
replies: text: as Basalt is an Igneous rock - Arjayay (talk) 10:15, 26 November 2019 (UTC)
thread_title:  Semi-protected edit request on 26 November 2019 

message: I know in the more traditional sense of types of metamorphism, it is mainly regional versus contact (or "local"). However, I do think at least a mention of shock metamorphism is relevant. There's even a Wikipedia page that could be linked/mentioned: https://en.wikipedia.org/wiki/Shock_metamorphism  
It includes many things like impactites, high-pressure polymorphs of quartz like coesite. I think Sudbury or Ries are a prime examples.
Joedf (talk) 18:25, 19 February 2020 (UTC)
thread_title:  Shock Metamorphism 

message: Discussion here. --Kent G. Budge (talk) 21:58, 23 February 2021 (UTC)
thread_title:  [[Metamorphism]] versus [[metamorphic rock]] 

message: Meaning of mode of metal morphic rocks 105.112.183.113 (talk) 16:22, 25 January 2022 (UTC)
thread_title:  Agricultural science 

message: website: https://opengeology.org/textbook/6-metamorphic-rocks/
Common error in many major, online professional geological references... claims that metamorphic rock "protoliths" are only sedimentary and igneous rocks.
Wikipedia "Metamorphic Rock" article correctly states that metamorphic rock "protoliths" include "... and existing metamorphic rocks." This sentence lacks a major professional geological reference, so I provided one above. More available.
Wikipedia "Protolith" article and its references incorrectly claim metamorphic rock protoliths include only sedimentary and igneous rocks. That article needs correction. Regardless of the many other online references that repeat this major error.
Proven cases over billions of years of plate tectonics show many major mountain belts have undergone multiple orogenies (mountain [re]building events) that clearly include re-metamorphism. Sometimes more intense "prograde" [re]metamorphism; sometime less intense "retrograde" [re]metamorphism. Cassiodorus8 (talk) 13:52, 15 March 2023 (UTC)
replies: text: please disregard and delete this proposal Cassiodorus8 (talk) 18:14, 15 March 2023 (UTC)
thread_title:  Add Existing Metamorphic Rock Protolith reference