User talk:Mikenorton

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Your place or mine ...?

I generally prefer unbroken discussions. If you leave a comment for me here, I will most likely respond to it here — my talk page — as an effort to keep the entire conversation in one place. Similarly, if I leave a comment on your talk page, please respond to it there.

At the same time, feel free to send an alert to me on this page about a comment you have left elsewhere.

Thank you!


Hello, Mikenorton, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or place {{helpme}} on your talk page and someone will show up shortly to answer your questions. Again, welcome!  Wow youve been doing all that editing in an important area and no one has said g'day (saw your work on Perth basin) anyway looks like youre doing well! SatuSuro 10:44, 17 October 2006 (UTC)

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Grand Parade[edit]

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Hello, Mikenorton. You have new messages at Tigerboy1966's talk page.
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Much thanks[edit]

Thank you so much for your help at Mary Kessell. I left last night with the intention of making additional corrections today and was pleasantly surprised to see it in the queue (thanks to your work). Much appreciated. All the best, France3470 (talk)

Thanks for fixing my mistake[edit]

Hi, thanks for fixing my accidental mistake on removing the Category:Megathrust earthquakes from the Megathrust earthquake article, I was actually intending to do that for another article that didn't belong in the category and accidentally did so for the article. My mistake. Stormchaser89 (talk) 011:19, 5 May 2015 (UTC


Don't get involved in the Galileo articles.

Passive Margins: Brazilian Margin[edit]

Hi Mikenorton, I didn't add the Brazilian Margin to the list I think I just reformatted the list when I added other entries. I think you are right that it would be more correct to just classify the south part of this margin as volcanic i.e. from where the SDRs are visible (South of -20Deg)? The paper 'South Atlantic volcanic margins' Gladczenko et al., (1997) in the Geological Society of London Journal has a good map on Figure 1. If you don't have access to this paper I can send you a copy. Alewisp14 (talk)

On formatting M[edit]

Regarding the symbol M used for earthquake Magnitude: do we have any notions of best practice on how it should be formatted? (E.g., italic or straight, spaced or closed-up, ??) Might there be any interest in having a template to handle the details? ~ J. Johnson (JJ) (talk) 00:26, 12 April 2016 (UTC)


Hi, Mike Norton -- I just wondered what you thought of the recent edits to Mesozoic: this and the one right before it. I don't think "ca." is needed for such large numbers, do you? Also, the use of "prelude" as a verb is quite unusual:

  • preludes to the lush Jurassic Period.

Does that sound right to you?  – Corinne (talk) 03:38, 15 April 2016 (UTC)

Hi Corinne, I've removed the "ca."s but added "roughly" or "about' as the numbers that divide the subdivisions are not as precise as quoted by the ICS. I also changed "preludes" to "precedes" and removed the older "lush" bit. Those edits overall improved things I think. Mikenorton (talk) 09:04, 15 April 2016 (UTC)
It's much better now. Thanks. I'm wondering whether "roughly" shouldn't be right before the first number in the ranges. If it is a synonym of "about", or "approximately", and you've put "about" right before the first number in another range, then shouldn't it be in the same place? "Ranges roughly from X to Y" or "ranges from roughly X to Y"? I'm on the fence, but I think the second one sounds more colloquial.  – Corinne (talk) 15:20, 15 April 2016 (UTC)


Hello, I have some information about speleologists who investigated Kruber Cave in 60s. You see, the thing is that 'Krubera' wrong name. Is correctly Kruber Cave (see Alexander Kruber). Krubera Cave is Russian form (see Пещера Крубера [Peshera (cave) krubera) — Preceding unsigned comment added by (talk) 14:57, 25 April 2016 (UTC)

You should raise this at the article talk page - Talk:Krubera Cave. I do note however, that most of the english language sources use the spelling currently used in the article name. We can only go by the sources. Mikenorton (talk) 23:30, 25 April 2016 (UTC)

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Answer to a question in which respect is peridotite metamorphic[edit]

Metamorphic processes involed in peridotite formation are

  • partial melting
  • phase transitions (garnet to spinel, spinel to plagioclase)
  • high temperature deformation (very important!These rocks have metamorphic texture). Pioneering work is done by Nicolas, French professor in late 70tie,s I think, I will add reference later.
  • and many others I can think later

These methamorphic processes occur in earth mantle. The most peridotite exposed on Earth surface are of the mantle origin.[1]

The rocks of earth’s mantle which are metamorphosed have been igneous rocks form by other igneous processes, from magma oceans in early earth history. I will try to expand the peridotite wiki in this respect if I have enough time. It is kind of priority, although I have other priorities... Obradow (talk) 16:04, 25 May 2016 (UTC)

OK, thanks Obradow, I understand now - I have a copy of Nicolas and Poirier (Crystalline plasticity and solid state flow in metamorphic rocks) on my bookshelf. The problem as I see it with calling it a metamorphic rock is that in most cases the peridotites that we see at the surface are from the mantle lithosphere. Although they are clearly deformed, tectonites I would call them, they don't have a changed mineralogy. Some would call them metamorphic, but I'm not so sure, although they can clearly be metamorphosed, that still makes them a metamorphosed igneous rock, rather than primarily a metamorphic rock. If you have a good source that describes them as metamorphic, then fair enough. Mikenorton (talk) 20:48, 25 May 2016 (UTC)

Hey THANK you Mikenorton for asking interesting question! Lets do following. Lets find the definition of metamorphic rocks. Wiki has to offer : Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". [2]

Textbook example [3] states that any methamorphism includs all changes that affect rocks as resalt of chnages in pressure, temerature or composition of fluids in rock. It is then further stated that this occurs in sedimentary, igneous and even former metamorphic rocks. So strictly speaking mantle peridotites are mehamorphic rocks. There must be textbooks with even more clear definition.

Well the upper mantle peridoties are clearly special. Maybe they should be new division of rocks of rocks on planet earth : Earth's Core rocks, Earth's Mantle rocks, and Earth's crust rocks. (: Then peridotites would be even more important (: Their origin is unique in the sense that mantle was formed in earth early history (please somebody help, I know I read that somewhere), Earth was liquid at one point (please somebody expand this), after separation of core, earth mantle than crystallised, after that, it did changed it composition, texture by mehamorphic melting processes, this is how oceanic and partly continental crust is formed. If I get time I would like to learn about this and write what I learned. Just as teaser you can think about mantle peridotites as some previous peridotite which lost melt to create earth's crust.Obradow (talk) 21:53, 25 May 2016 (UTC)

I've reverted User:Obradow's edit in the Peridotite article about peridotite being a metamorphic rock. I've explained why, and offered an invitation for comment, at Talk:Peridotite#Igneous or metamorphic rock. GeoWriter (talk) 21:30, 27 May 2016 (UTC)
That sounds like a good plan, thanks. Mikenorton (talk) 21:36, 27 May 2016 (UTC)


  1. ^ Hall, Anthony (1998). Igneous petrology (2. ed., reprinted. ed.). Harlow: Longman. ISBN 9780582230804. 
  2. ^ entry
  3. ^ Philpotts, Cornelis Klein, Anthony R. (2013). Earth materials : introduction to mineralogy and petrology (Reprinted with corrections. ed.). New York: Cambridge University Press. ISBN 9780521145213. 

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Primary School[edit]

Perhaps you can help me about the categories...

I inherited of the Primary School project, which aims at improving a selection of articles considered relevant to Primary Education. As part of this project, I need to follow up do quality assessment, hence my adding the WikiProject to the talk pages of those articles (slightly over 200).

But the WikiProject Primary School was declared as a sub-project of South Africa WikiProject... so the problem I have is that I want to actually put the Primary School Project in the talk page to follow up quality, but not really the South Africa WikiProject. But I have no idea how to do it. I tried to find solution to only display one but not the other, but I could not find out how to do it. Practically, I do not even really care if the PP Projects is visible on the talk page. I only need to tag the pages so I can follow them for the quality assessement.

Do you have any idea how to do that ? Can you help or suggest directions ?

My alternative is to entirely remove the Primary School Project from the South Africa fatherhood... but am not sure if that is ok to do that and will obviously takes me a huge amount of time to fix everything. Any idea ?

Anthere (talk)

My apologies first of all for messing up my edit summary - when I referred to categories I meant WikiProjects (WPs) - that's what I get for trying to fit in a quick edit during my my lunch hour. To add a WP to an article it really needs to belong there, or we can end up with tens to hundreds for an article which would not be appropriate. I'm afraid that I don't know much about sub-projects, just the two that I'm involved in, WP Geology and WP Earthquakes, which don't, as far as I'm aware have, have subprojects. A good place to ask might be at the talk page of Wikipedia:WikiProject Council/Guide, but I see that you already know about that. Mikenorton (talk) 17:36, 6 July 2016 (UTC)


There's a bunch of material to cover, but it would be appreciated if you could go over it and comment at Talk:Earthquake_prediction#RfC re neutrality/POV issues. ~ J. Johnson (JJ) (talk) 23:01, 9 July 2016 (UTC)

Hi JJ, I've already spent hours looking at "natural time" references and failed to come to any definite conclusions other than we're a little early in the history of the approach to be sure about anything. I will try to come up with something at the Rfc. Mikenorton (talk) 10:43, 10 July 2016 (UTC)
Thanks. Yeah, it is rather mind-boggling. (Don't get sucked down the drain!!) Even though I am not competent with large swaths of physics and mathematical analysis, yet I feel that my own failed attempts to grapple with any substance in those articles is less a reflection on my competence (or lack of) than on a lack of substance to grapple. That kind of stuff seems to be a counter-demonstration of the old saying that "you can't shine s**t". ~ J. Johnson (JJ) (talk) 23:14, 11 July 2016 (UTC)

Precious anniversary[edit]

Four years ago ...
Cornflower blue Yogo sapphire.jpg
knowledge of earthquakes
... you were recipient
no. 177 of Precious,
a prize of QAI!

--Gerda Arendt (talk) 05:52, 10 July 2016 (UTC)

Thanks again Gerda. Mikenorton (talk) 10:44, 10 July 2016 (UTC)