mya vs ma
why did someone decide 'ma' is better than 'mya'?
mya is simple direct, to the point. only problem is its in english...
then again, why not have the 'ago' translated into latin or whatever. it makes no snse to just say 'xyz happened 500 years'. —Preceding unsigned comment added by Decora (talk • contribs) 16:36, 30 December 2008 (UTC)
Myr is the standard of duration and Ma is the standard of date. Example: The mountain belt formed at 10 Ma = The mountain belt formed 10 million years ago The transform fault was inactive for 10 Myr until the catastrophic event at 2 Ma = The transform fault was inactive for 10 million years until the catastrophic event 2 million years ago. It would be convinient to refer to M.-P. Aubry, J. A. Van Couvering, N. Christie-Blick, E. Landing, B. R. Pratt, D. E. Owen, and I. Ferrusquia-Villafranca. Terminology of geological time: Establishment of a community standard. STRATIGRAPHY, 6(2):100–105, 2009. --Leonardo.quevedo (talk) 01:36, 17 March 2011 (UTC)
- mya does not equal myr.
(William M. Connolley 15:32, 20 Feb 2005 (UTC)) This page is (usefully) linked from a number of wiki pages. Why move it to wiktionary? I would rather it not be moved; but it should go to wacronym, not wiktionary, anyway :-)
- The problem is that the page is no more than a dictionary definition of several related terms, which is what Wiktionary is there for. (See Wikipedia:What_Wikipedia_is_not) Simon 19:26, Feb 21, 2005 (UTC)
Theoretically, someone could turn it into a list of acronyms used in geology. If that were to happen, however, I would have to recommend they think of a better title than mine. - Vague | Rant 09:22, Mar 19, 2005 (UTC)
- I strongly agree with William H. Connolley that this page should not be moved to Wiktionary. We have articles for other units used in science, as well as time abbreviations like BC, so there is no reason this page should be moved to Wiktionary. —Lowellian (talk) 05:08, May 27, 2005 (UTC)
- This article should be replaced by a redirect to the modern Mega-annum. Just listing a bunch of things that were on the order of a million years ago doesn't rescue the article. It is conceptually redundant with Bya etc, each being simply a multiple of ya. Worse, the Bya suffers from the Long and short scales ambiguity. However silly the idea of 10^12 years ago may seem to short scale adapted scientists or to followers of the Ussher chronology, some readers will still be confused by it. Tagged as rfd. Please pursue discussion there. LeadSongDog 20:57, 24 July 2007 (UTC)
- Ok, so I've now added a multiplemergerfrom tag on Annum pointing talk to here, plus advised a bunch of recent editors to this article and its originator. I look forward to a discussion over the coming days.
- I agree with the idea of making the terms consistent, and it would be OK with me to have it all redirected to Mega-annum as LeadSongDog suggests. There has been some attempt, usually changed later by others, to use Ma or Ga consistently in geology articles (those are the terms of choice for professionals and I think they are increasingly showing up in popular literature, if the phrase is not written out) but it keeps getting changed to mya or bya. I also agree that the list of things at about 1 million years is silly to have on this article. And I support the idea of keeping it in Wikipedia, as it is not simply a definition, the article(s) can include items of usage and alternatives, for example. Cheers Geologyguy 22:11, 25 July 2007 (UTC)
I believe the Light Years section is somewhat ambiguously mixed with other years and mya, so someone might came to the wrong conclusion that ly is also a unit of time (not quite uncommon to happen!). It should be reorganized somehow or explicitly marked as distance unit, to avoid that possibility. --Arny 20:18, 27 February 2006 (UTC)
- Mention of light years was pointless and irrelevant. It is gone now.
- Urhixidur 22:44, 27 February 2006 (UTC)
The title should be changed to Ma (unit). Outside of the english speaking world nobody uses Mya, the international convention is Ma (mega annum). Now this is an english encyclopedia, but the term used in literature is Ma, because most of the authors are not native in english. Let's stick to the scientific conventions. Woodwalker 10:10, 5 June 2006 (UTC)
I agree with woodwalker (comment above). Besides, English-speaking scientists use "Ma" rather than "mya" (e.g., see Gradstein et al. 2004 - A geologic time scale 2004, Cambridge University Press). I never met "mya" in my professional career, so I suppose it is now a word in disuse.
Kaapitone 18:47, 30 October 2006 (UTC)
Coherent discussion of similar articles
Neanderthal's have only been found in Europe, so it seesm odd that the sep is put before the expansion out of Africa. Worth some checking.Snori 00:32, 7 November 2007 (UTC)
- Neanderthal#Genome indicates a range of dates for initial/complete separation.LeadSongDog 04:09, 7 November 2007 (UTC)
The light we (do not) see now from the centre of the Milky Way started 0.026 mya
Uh... what does mean this? Without an explanation, I believe it should be deleted. --Kaapitone 14:09, 10 November 2007 (UTC)
- It means the editor didn't understand relativity. There are lots of people in that situation, it's no shame. LeadSongDog (talk) 20:37, 6 May 2008 (UTC)
why doesn't somebody put some information on this page?
ka, Ma, Ga for date; kyr, Myr, Gyr for duration
the following article
- ka, Ma, Ga for date
- kyr, Myr, Gyr for duration