Template talk:Period start

Updated chronology
The IUGS has issued an update to the statigraphic time scale effective July 2012. See new chart here: This should be incorporated into the protected period templates. MMartyniuk (talk) 09:53, 9 August 2012 (UTC)

Redundancy
There is a redundant template: Template:Geologic_Ages_Inline. Which one should be kept/replaced? — Preceding unsigned comment added by Jdfekete (talk • contribs) 18:20, 13 November 2012 (UTC)


 * Hi Jdfekete! I created the template "Geologic Ages Inline" because Wikiproject Geology needed a template that returns the timescale ages with their standard error. There is no redundancy because "period_start" and "period_end" don't return standard errors. --Tobias1984 (talk) 17:03, 14 November 2012 (UTC)


 * Yes, merging is a bad idea, because other templates (e.g. Template:Fossil range) require that numbers are displayed without error bars, tildes, etc. If maintaining two sets of numbers is too much work then geologic ages inline could be modified so that individual lines call period start. Martin  (Smith609 – Talk)  10:05, 7 January 2016 (UTC)

Edit request on 9 November 2012
I updated this template to the geologic time scale 2012 (http://stratigraphy.org/column.php?id=Chart/Time%20Scale). I put the updated version here: (http://en.wikipedia.org/wiki/User:Tobias1984/Period_start_sandbox). -- Tobias 19 84  23:08, 14 November 2012 (UTC)
 * Yes check.svg Done — Mr. Stradivarius  (have a chat) 11:30, 15 November 2012 (UTC)

Edit request Hadean
Can you change the date of the Hadean from: to Source: Reason: The beginning of the Hadean is now by definition 4600 Ma (without error). --Tobias1984 (talk) 09:18, 8 June 2013 (UTC)
 * hadean|precambrian=4567.17
 * hadean|precambrian=4600
 * Yes check.svg Done. Thanks for the update! — Mr. Stradivarius  ♪ talk ♪ 14:05, 12 June 2013 (UTC)

Edit Request "This template needs cleaning up"
To me the template layout looks like a mess, with spacing after the dash, unoffical periods not in a seperate place, missing some alternative spellings and some official periods, and dates off by several hundred thousands of years. I cleaned up simple English's wiki edit page 2 months ago. The cleaned up text is shown below, you may copy it into the official template but be sure to check some errors to fix or create the sandbox page to test this. 24.218.110.195 (talk) 13:50 11 August 2013 (UTC) 9:50am 08/11/2013 EDT.
 * Disabled edit request. Can't deploy untested code. —Th e DJ (talk • contribs) 08:43, 27 August 2013 (UTC)

Updated error margins
The latest chart - http://www.stratigraphy.org/index.php/ics-chart-timescale - appears to have updated many of the error margins from what is currently being used by the template. I haven't checked all of the dates so some of those may also have changed. I would be happy to do the drudge but don't have access so someone else will need to go thru and cross-check all the dates and errors.

One final (important) thing, where the error is an integer value and the reference (ie above-linked chart) lists trailing zeroes (eg 1.0), pls include these in the template as they are an explicit indicator of precision. Thx. 124.169.82.178 (talk) 04:30, 30 August 2013 (UTC)

Protected edit request on 11 June 2014
Can the following period starts be brought into accordance with ICS V2014/02 (http://www.stratigraphy.org/ICSchart/ChronostratChart2014-02.jpg) This is urgent, since the Wikipedia pages concerned are already changed but this template is protected

period start of Quaternary/Pleistocene/Galasien should be changed from 2.588 to 2.58 Ma and perhaps others, see http://www.stratigraphy.org/ICSchart/ChronostratChart2014-02.jpg

Jgamleus (talk) 01:15, 11 June 2014 (UTC)
 * Could you add your proposed changes to the template sandbox? It's hard for me to know what to edit from your description, and updating all the data fields would be quite intensive work. If you can update the sandbox first, that would simplify things considerably. Best — Mr. Stradivarius  ♪ talk ♪ 06:47, 11 June 2014 (UTC)
 * Red information icon with gradient background.svg Not done: please make your requested changes to the template's sandbox first; see WP:TESTCASES. Per . — &#123;&#123;U&#124;Technical 13&#125;&#125; (e • t • c) 12:31, 11 June 2014 (UTC)
 * Ok, I brought the ages for the Quaternary and Calabrian into accordance with http://www.stratigraphy.org/ICSchart/ChronostratChart2014-02.jpg. For a start. Can you change it in the protected page? Jgamleus (talk) 23:48, 12 June 2014 (UTC)
 * ✅ -- John of Reading (talk) 05:54, 13 June 2014 (UTC)
 * Ok, brought the ages of the periods mentioned in the first two columns of http://www.stratigraphy.org/ICSchart/ChronostratChart2014-02.jpg into accordance with http://www.stratigraphy.org/ICSchart/ChronostratChart2014-02.jpg. Can you change it in the protected page?
 * Pictogram voting wait.svg Already done I'm marking this re-opening of the request as already done because in the comment right above this last post by, says it's already ✅... — &#123;&#123;U&#124;Technical 13&#125;&#125; (e • t • c) 17:41, 14 June 2014 (UTC)
 * There was [//en.wikipedia.org/w/index.php?title=Template:Period_start/sandbox&diff=612770515&oldid=612700792 another edit to the sandbox] after I marked the request as "done". I have applied that edit to the main template. -- John of Reading (talk) 19:46, 14 June 2014 (UTC)

Revert request
or anyone: The recent edit today to add a merge notice banner seems to have broken Template:Geological_range. Please revert. Mamyles (talk) 17:51, 17 November 2015 (UTC)
 * Pictogram voting wait.svg Already done. SiBr4 (talk ) 18:12, 17 November 2015 (UTC)

Refactoring
While merging from Geologic Ages Inline, I have done a major refactoring of Period start to make the code better readable and to correspond well with Period start ref. Please review this year's changes to the [//en.wikipedia.org/w/index.php?title=Template:Period_start/sandbox&action=history sandbox] and then replace the production code with my last version. The testcases may help you; you can see there that the new code accepts both spaces and hyphens as word separators. Petr Matas 15:50, 14 July 2016 (UTC)

As the proposal above has not been opposed for a month, I am requesting the code of this template to be overwritten with my last version from the sandbox. Petr Matas 21:30, 15 August 2016 (UTC)
 * It's expected that the sandbox allows 3 extra cases that the current live template does not, right? The changes look all right otherwise to me. Question: what should be happening with the existing 95 transclusions of Geologic Ages Inline? — Andy W.  ( talk  · ctb) 22:53, 15 August 2016 (UTC)
 * Yes, those three test cases are an example of newly supported cases that are not supported by the current live template. All currently supported cases continue to be supported by the sandbox as well. The template Geologic Ages Inline should be rewritten to make use of Period start, Period start error and Period start ref, so modification of its transclusions should not be necessary. Petr Matas 03:24, 16 August 2016 (UTC)
 * ✅ Rules of engagement  Paine   06:53, 16 August 2016 (UTC)

ICS update 2017
The ICS dates have recently been updated for the Permian and Triassic. However I am having trouble updating them due to these templates (I cannot update the templates for some unknown reason they are not coming up) so for now I am removing the templates from pages. If you would like to help by updating said templates thatLavalizard101 (talk) 16:11, 28 September 2017 (UTC)
 * don't remove the templates! Please list here the changes you need + the source and the templates can be fixed. Peter coxhead (talk) 20:52, 28 September 2017 (UTC)
 * http://www.stratigraphy.org/index.php/ics-chart-timescale have recently released a new version V2017/2 which changes some of the dates such as the Permian now ends 251.902 instead of 252.2 mya (along with this being the start of the Triassic), The Carnian now ends 227 instead of 228 (along with this being the start of the Norian), The Ladinian now ends 237 instead of 235 mya.Lavalizard101 (talk) 21:09, 28 September 2017 (UTC)


 * Ok, so to be precise:

|    mesozoic
 * triassic
 * lower triassic
 * induan      = 252.17
 * needs 251.902 instead of 252.17.

|          norian       = 227
 * needs 228 instead of 227.


 * However, yields, so this appears to be correct already.
 * If this is confirmed, I (or another editor with the right privileges) can make these two changes. Peter coxhead (talk) 21:50, 28 September 2017 (UTC)
 * Yeah, I'll implement when it's confirmed. Primefac (talk) 22:15, 28 September 2017 (UTC)

Norian is fine, according to what Lavalizard is saying. Having updated the individual period templates, some additional changes: Lythronaxargestes (talk &#124; contribs) 23:12, 28 September 2017 (UTC)
 * Chattian → 27.82
 * Roadian → 272.95

Template-protected edit request on 29 September 2017
I'd like the changes I've made on the template sandbox version to be introduced to the full template. They are all minor fixes from the new (june 2017) IUCS stratigraphic chart. The most important fix is the permian/triassic (and thus paleozoic/mesozoic) boundary being changed from 252.5(?) to 251.902. EDIT: didn't see section bbove. (should've looked :P). All the changes above are in the version I edited on the sandbox, including additional changes. IJReid discuss 00:17, 29 September 2017 (UTC)
 * Yes check.svg Done Primefac (talk) 01:41, 29 September 2017 (UTC)

Template-protected edit request on 20 March 2020
I've noticed that some of these period start times are outdated ("Middle Pleistocene", "Late/Upper Pleistocene"). the current start dates they have are 0.781 and 0.126 mya, respectively, when they should be 0.774 and 0.129 mya, respectively. I've also noticed that some time periods have received new names (the Chibanian was officially ratified in Jan. 2020) that haven't been added yet. I've also noticed that some time periods have alternate names that haven't been added here yet, including:


 * the upper pleistocene can be called the late pleistocene or the tarantian
 * the lower pleistocene can be called the early pleistocene
 * the middle pleistocene can be called the Chibanian (as previously discussed) or the Ionian
 * the greenlandian can be called the early holocene or the lower holocene
 * the northgrippian can be called the middle holocene
 * the Meghalayan can be called the upper holocene or the late holocene

here's an example of everything that needs to be changed: = 1.8                        = 0.774                         = 0.24                         = 0.129                         = 0.0117                         = 0.0082                         = 0.0042                         = 0 This can all be found at the end of the current template code. doing this edit would allow functions like the span function, period start function, and next period function/end period function to work properly, especially for the most recent ages, and would allow templates to stay up-to-date and working. thank you for processing my request. Benniboi01 (talk) 18:43, 20 March 2020 (UTC)
 * quaternary
 * pleistocene
 * lower pleistocene | early pleistocene
 * gelasian    = 2.58
 * calabrian   = 1.80
 * irvingtonian
 * middle pleistocene |chibanian | ionian
 * rancholabrean
 * upper pleistocene | late pleistocene | tarantian
 * holocene | greenlandian | early holocene | lower holocene
 * northgrippian | middle holocene
 * meghalayan | late holocene | upper holocene
 * now | recent | present | current
 * , thanks for pointing this out! Would it be possible to make all the changes you're requesting to the template's sandbox, so editors who don't know paleontology can then just copy over the sandbox version? Also, it looks like Period start ref would also need corresponding updates, which could be made at Template:Period start ref/sandbox. Enterprisey (talk!) 03:55, 22 March 2020 (UTC)
 * I got everything I wanted changed on the sandbox, . I've also added these changes to period start ref, as you asked. I also fixed One more thing: I added the miaolingian and the wuliuan in the Cambrian, which were renamed from 'series 3' and 'stage 5', respectively, in July 2017. I did not catch this when i made my original edit request a while ago, but I caught it as I was editing period start ref.


 * It's all good to go for an edit now, I think.Benniboi01 (talk) 18:51, 22 March 2020 (UTC). Updated 19:02, 23 March 2020 (UTC).
 * Yes check.svg Done &mdash; Martin (MSGJ · talk) 21:35, 29 March 2020 (UTC)

Template-protected edit request on 13 July 2021
Meekororum (talk) 23:52, 13 July 2021 (UTC)Change the T/J boundary to 201.4 Ma based on the newest information we have from the Geologic Time Scale 2020. Also change the J/K boundary to 143.1 Ma from the same source mentioned earlier.
 * Perhaps someone like can make more sense of this - seems like it is a "content" change, and I have no background in this topic. —  xaosflux  Talk 18:03, 15 July 2021 (UTC)
 * Red question icon with gradient background.svg 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. Primefac (talk) 00:25, 16 July 2021 (UTC)
 * I haven't seen those new dates on the timescale before, but I'm not saying they're wrong. Could you provide the source where you found this information? Benniboi01 (talk) 16:36, 18 July 2021 (UTC)
 * These dates are from the book Geologic Time Scale 2020. The book contains chapters for each period, and provides images which list the base of every geologic stage. But I realize that a change is unnecessary, given that many of these changes are not as of yet defined, they are simply given as candidate ages. Meekororum (talk) 17:00, 18 July 2021 (UTC)

Geological Time Scale 2020
I was wondering for the sake of whoever runs this template: should it be updated according to the 2020 edition of the Geological Time Scale ? I've noticed that there are some differences between the boundary age estimates given in the book when compared to the ICS chart and GSSP list, despite being run by basically the same people. I believe that the book has been updated with more recent data than the ICS publications in most cases, and it would be useful to have that show up in the template considering how widely used it is. Fanboyphilosopher (talk) 21:35, 21 February 2022 (UTC)
 * If updates are needed, feel free to sandbox them (to ensure they work properly) and then propose a change. Primefac (talk) 07:59, 22 February 2022 (UTC)
 * I guess that I'm asking which source should be the main reference (ICS chart and list or GTS2020) for the dates and GSSP info given, if they are in conflict. The former mostly relies on GTS2012 with a few small edits up to 2022, while the latter is a fully revised edition. What is the standard procedure for this kind of situation? Fanboyphilosopher (talk) 15:12, 22 February 2022 (UTC)
 * No idea. I suggest asking at one of the related WikiProjects. Primefac (talk) 16:45, 22 February 2022 (UTC)

Template-protected edit request on 2 April 2022
I am requesting changes to the template in order to update the time definitions to the current international chronostratigraphic chart (v2022/02) [Https://stratigraphy.org/ICSchart/ChronostratChart2022-02.pdf https://stratigraphy.org/ICSchart/ChronostratChart2022-02.pdf].

These changes are:
 * Chattian from 28.1 to 27.82
 * Priabonian from 37.8 to 37.71
 * Aptian from ~125 to ~121.4
 * Hauterivian from 132.9 to 132.6
 * Wuchiapingian from 259.1 to 259.51
 * Capitanian from 265.1 to 264.28
 * Wordian from 268.8 to 266.9
 * Roadian from 272.95 to 273.01
 * Sakmarian from 295 to 293.52
 * Fortunian from 541 to 538.8

I have updated the sandbox and testcases to reflect these changes and they appear to be functional. I have also updated the associated age uncertainties in the chart on Geologic time scale and in Template:Period start error in preparation for this edit. Jarred C Lloyd (talk) 02:28, 2 April 2022 (UTC)
 * ✅ * Pppery * it has begun... 15:38, 4 April 2022 (UTC)
 * Thanks @Pppery for making the edit. Jarred C Lloyd (talk) 02:25, 5 April 2022 (UTC)

Template-protected edit request on 14 January 2023
I am requesting an edit to this template because, once again, some of the boundaries of the time periods have been changed. This new data comes from the International Commission on Stratigraphy's latest rendition of the geologic timescale:, Changelog:

The changes are:
 * Tithonian from 152.1 to 149.2
 * Kimmeridgian from 157.3 to 154.8
 * Oxfordian from 163.5 to 161.5
 * Callovian from 166.1 to 165.3
 * Bathonian from 168.3 to 168.2
 * Bajocian from 170.3 to 170.9
 * Aalenian from 174.1 to 174.7
 * Toarcian from 182.7 to 184.2
 * Pliensbachian from 190.8 to 192.9
 * Sinemurian from 199.3 to 199.5
 * Hettangian from 201.3 to 201.4
 * Hadean from ~4600 to 4567

The Hadean change is explained in the provided changelog, in case it seems weird. I've already updated the sandbox with these dates, and I will update the uncertainties on Template:Period start error and Geologic time scale. Benniboi01 (talk) 18:49, 14 January 2023 (UTC)
 * ✅ Primefac (talk) 08:26, 16 January 2023 (UTC)
 * @Primefac, I made a mistake with the Hadean GSSA. The Hadean age is actually 4567.3, not 4567. Could you fix it? I can submit another request if needed. Benniboi01 (talk) 18:08, 16 January 2023 (UTC)
 * Done. Primefac (talk) 11:24, 17 January 2023 (UTC)

Edit request 29 August 2023
Description of suggested change: Update to ICC v2023/06

Two minor changes to dates in this update. Langhian from 15.97 to 15.98, and Barremian from ~129.4 to 125.77. Changed in the sandbox and appears to be working correctly in the test cases.

Diff: Jarred C Lloyd (talk) 12:00, 29 August 2023 (UTC)
 * ✅ Primefac (talk) 12:04, 29 August 2023 (UTC)

Template-protected edit request on 30 October 2023
A new timescale came out a few days ago with the archean GSSA updated. For the line that reads:

|    eoarchean | isuan = 4000

replace it with:

|    eoarchean | isuan = 4031

Thank you! Benniboi01 (talk) 03:16, 30 October 2023 (UTC)
 * ✅ Primefac (talk) 08:48, 30 October 2023 (UTC)