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	<title>Template:Infobox geologic timespan/doc - Revision history</title>
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	<updated>2026-10-18T08:02:03Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<title>imported&gt;John of Reading: Typo fixing, replaced: necesary → necessary</title>
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		<updated>2022-03-04T12:38:28Z</updated>

		<summary type="html">&lt;p&gt;Typo fixing, replaced: necesary → necessary&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;{{Documentation subpage}}&lt;br /&gt;
&amp;lt;!-- Add categories where indicated at the bottom of this page and interwikis at Wikidata --&amp;gt;&lt;br /&gt;
{{Infobox&lt;br /&gt;
| autoheaders = y&lt;br /&gt;
| bodystyle = width:{{{width|23em}}};&lt;br /&gt;
| labelstyle = width:10em;&lt;br /&gt;
| abovestyle =  padding:0.25em 0.33em 0.33em;line-height:1.2em;font-size:1.25em;background:lightgrey;&lt;br /&gt;
| above = Header and Title&lt;br /&gt;
| headerstyle = background:#ededed;&lt;br /&gt;
| subheader = {{Phanerozoic 220px}}&amp;lt;/div&amp;gt;&lt;br /&gt;
&lt;br /&gt;
| header1 = Chronology&lt;br /&gt;
| data3 = ...&lt;br /&gt;
&lt;br /&gt;
| header15 = Etymology&lt;br /&gt;
| data17 = ...&lt;br /&gt;
&lt;br /&gt;
| header25 = Usage information&lt;br /&gt;
| data27 = ...&lt;br /&gt;
&lt;br /&gt;
| header37 = Definition&lt;br /&gt;
| data39 = ...&lt;br /&gt;
&lt;br /&gt;
| header57 = Atmospheric and climatic data&lt;br /&gt;
| data58 = ...&lt;br /&gt;
| data59 = ''See below for details''&lt;br /&gt;
}}&lt;br /&gt;
== Usage ==&lt;br /&gt;
This infobox template is used to generate an infobox on the right-hand side of articles pertaining to:&amp;lt;br/&amp;gt;&lt;br /&gt;
a) specific spans of geologic time accepted for general use (i.e [[Cambrian]]), &amp;lt;br/&amp;gt;&lt;br /&gt;
b) regionally used subdivisions of geologic time (i.e [[Arenig]]), &amp;lt;br/&amp;gt;&lt;br /&gt;
c) proposed subdivisions of geologic time (i.e [[Chaotian (geology)|Chaotian]]), &amp;lt;br/&amp;gt;&lt;br /&gt;
d) subdivisions of extraterrestrial geologic time (i.e [[Nectarian]]). &amp;lt;br/&amp;gt;&lt;br /&gt;
&lt;br /&gt;
== Parameters ==&lt;br /&gt;
&lt;br /&gt;
=== Header and Title Parameters ===&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
| name                         = ''name''&lt;br /&gt;
| color                        = Cenozoic&lt;br /&gt;
| top_bar                      = Phanerozoic&lt;br /&gt;
| time_start                   = 654&lt;br /&gt;
| time_start_prefix            = &lt;br /&gt;
| time_start_uncertainty       = &lt;br /&gt;
| time_end                     = 321&lt;br /&gt;
| time_end_prefix              = &lt;br /&gt;
| time_end_uncertainty         = &lt;br /&gt;
| image_map                    = [[File:Pangea in the triassic.tif|220px]]&lt;br /&gt;
| caption_map                  = ''image_map''&lt;br /&gt;
| image_outcrop                = [[File:The rocky outcrop of the Upper Cretaceous.JPG|220px]]&lt;br /&gt;
| caption_outcrop              = ''image_outcrop''&lt;br /&gt;
| image_art                    = [[File:Dinosaurs Park.jpg|220px]]&lt;br /&gt;
| caption_art                  = ''image_art''&lt;br /&gt;
&lt;br /&gt;
;[Restrictive parameters (above)]&lt;br /&gt;
: ''color = Cenozoic''&lt;br /&gt;
: ''top_bar = all time''&lt;br /&gt;
: ''time_start = 654''&lt;br /&gt;
: ''time_end = 321''&lt;br /&gt;
}}&lt;br /&gt;
The following parameters control the images, horizontal timeline bar, and title text at the top of the infobox template.&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|+Header and Title Parameters&lt;br /&gt;
!Parameter&lt;br /&gt;
!Function&lt;br /&gt;
|-&lt;br /&gt;
|name&lt;br /&gt;
|The text at the top of the template.&lt;br /&gt;
|-&lt;br /&gt;
|color&lt;br /&gt;
|Determines the color behind the title using [[Template:Period color]]. A valid period name string is required for this to work. For custom RGB values, see manual_set_color.&lt;br /&gt;
|-&lt;br /&gt;
|manual_color&lt;br /&gt;
|Sets the color behind the title with RGB values.&lt;br /&gt;
|-&lt;br /&gt;
|accessible&lt;br /&gt;
|Turns the title text white. Use on articles where the time span's color does not have enough contrast with the default black title text.&lt;br /&gt;
|-&lt;br /&gt;
|top_bar&lt;br /&gt;
|Determines the variety of horizontal timeline bar below the title text. Defaults to a horizontal [[Phanerozoic]] timeline when not invoked. Current accepted values are:&amp;lt;br/&amp;gt;&lt;br /&gt;
- mercury/mercurial (Mercurial geologic timeline)&amp;lt;br/&amp;gt;&lt;br /&gt;
- moon/lunar (Lunar geologic timeline)&amp;lt;br/&amp;gt;&lt;br /&gt;
- mars/martian (Martian geologic timeline)&amp;lt;br/&amp;gt;&lt;br /&gt;
- long fossil/long/all time (complete timeline of earth's history)&amp;lt;br/&amp;gt;&lt;br /&gt;
('''''NOTE:''''' Upper/lower case does not matter for these values.)&lt;br /&gt;
|-&lt;br /&gt;
|earliest&lt;br /&gt;
|Adds a translucent green bar to the solid green bar of the horizontal timeline, extending to the earliest possible timeframe the time span could be considered as occupying.&amp;lt;br/&amp;gt; &lt;br /&gt;
It is recommended not to use this parameter unless there is ongoing dispute involving the time span's boundaries. See [[Template:Geological range]] for more information.&lt;br /&gt;
|-&lt;br /&gt;
|latest&lt;br /&gt;
|Adds a translucent green bar to the solid green bar of the horizontal timeline, extending to the latest possible timeframe the time span could be considered as occupying.&amp;lt;br/&amp;gt;&lt;br /&gt;
It is recommended not to use this parameter unless there is ongoing dispute involving the time span's boundaries. See [[Template:Geological range]] for more information.&lt;br /&gt;
|-&lt;br /&gt;
|top_bar_ref&lt;br /&gt;
|Inserts a reference into the text above the timeline bar.&lt;br /&gt;
|-&lt;br /&gt;
|time_start&lt;br /&gt;
|The time when the geologic time span starts, in millions of years.&lt;br /&gt;
|-&lt;br /&gt;
|time_start_prefix&lt;br /&gt;
|Used to add a ~ in front of the displayed numerical start time. Should not be used for other purposes.&lt;br /&gt;
|-&lt;br /&gt;
|time_start_uncertainty&lt;br /&gt;
|The level of uncertainty on the measurement of time span start time.&lt;br /&gt;
|-&lt;br /&gt;
|time_end&lt;br /&gt;
|The time when the geologic time span ends, in millions of years.&lt;br /&gt;
|-&lt;br /&gt;
|time_end_prefix&lt;br /&gt;
|Used to add a ~ in front of the displayed numerical end time. Should not be used for other purposes.&lt;br /&gt;
|-&lt;br /&gt;
|time_end_uncertainty&lt;br /&gt;
|The level of uncertainty on the measurement of time span end time.&lt;br /&gt;
|-&lt;br /&gt;
|top_bar_prefix&lt;br /&gt;
|Adds text before the &amp;quot;xxx Ma&amp;quot; text above the horizontal timeline. It is recommended not to use this parameter unless absolutely necessary. See [[Template:Geological range]] for more information.&lt;br /&gt;
|-&lt;br /&gt;
|top_bar_ps&lt;br /&gt;
|Adds text after the &amp;quot;xxx Ma&amp;quot; text above the horizontal timeline. It is recommended not to use this parameter unless absolutely necessary. See [[Template:Geological range]] for more information.&lt;br /&gt;
|-&lt;br /&gt;
|image_map&lt;br /&gt;
|Reconstruction of the Earth as it appeared during the geologic time span.&lt;br /&gt;
|-&lt;br /&gt;
|caption_map&lt;br /&gt;
|Caption for the above image.&lt;br /&gt;
|-&lt;br /&gt;
|image_outcrop&lt;br /&gt;
|Picture of a rock outcrop with rocks dating to the geologic time span.&lt;br /&gt;
|-&lt;br /&gt;
|caption_outcrop&lt;br /&gt;
|Caption for the above image.&lt;br /&gt;
|-&lt;br /&gt;
|image_art&lt;br /&gt;
|Reconstruction of a landscape/ecosystem as it may have appeared during the time span.&lt;br /&gt;
|-&lt;br /&gt;
|caption_art&lt;br /&gt;
|Caption for the above image.&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
===Chronology Parameters===&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
&amp;lt;!--Chronology--&amp;gt;  &lt;br /&gt;
| timeline                     = ''&amp;lt;nowiki&amp;gt;TIMELINE&amp;lt;/nowiki&amp;gt;''&lt;br /&gt;
| part_of                      = ''part_of''&lt;br /&gt;
| before                       = ''before''&lt;br /&gt;
| after                        = ''after''&lt;br /&gt;
| subdivisions                 = ''subdivisions''&lt;br /&gt;
| proposed_boundaries1         = ''proposed_boundaries1''&lt;br /&gt;
| proposed_boundaries1_ref     = ''proposed_boundaries1_ref''&lt;br /&gt;
| proposed_boundaries2         = ''proposed_boundaries2''&lt;br /&gt;
| proposed_boundaries2_ref     = ''proposed_boundaries2_ref''&lt;br /&gt;
| proposed_boundaries3         = ''proposed_boundaries3''&lt;br /&gt;
| proposed_boundaries3_ref     = ''proposed_boundaries3_ref''&lt;br /&gt;
| proposed_subdivision1        = ''proposed_subdivision1''&lt;br /&gt;
| proposed_subdivision1_coined = ''proposed_subdivision1_coined''&lt;br /&gt;
| proposed_subdivision2        = ''proposed_subdivision2''&lt;br /&gt;
| proposed_subdivision2_coined = ''proposed_subdivision2_coined''&lt;br /&gt;
| proposed_subdivision3        = ''proposed_subdivision3''&lt;br /&gt;
| proposed_subdivision3_coined = ''proposed_subdivision3_coined''&lt;br /&gt;
| former_subdivisions          = ''former_subdivisions''&lt;br /&gt;
| formerly_part_of             = ''formerly_part_of''&lt;br /&gt;
| partially_contained_in       = ''partially_contained_in''&lt;br /&gt;
| partially_contains           = ''partially_contains''&lt;br /&gt;
}}&lt;br /&gt;
The following parameters produce results that display in the &amp;quot;Chronology&amp;quot; section of the infobox. (Note that &amp;quot;proposed_subdivision1&amp;quot; and &amp;quot;proposed_subdivision1_coined&amp;quot; are the first in a series of parameters that goes sequentially in name (proposed_subdivision2 and proposed_subdivision2_coined, etc). They are not listed to avoid redundancy.)&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|+Chronology Parameters&lt;br /&gt;
!Parameter&lt;br /&gt;
!Function&lt;br /&gt;
|-&lt;br /&gt;
|timeline&lt;br /&gt;
|Places a pre-made vertical timeline in the infobox.&lt;br /&gt;
|-&lt;br /&gt;
|part_of&lt;br /&gt;
|Use to list all subdivisions of geologic time that the time span is a part of. (NOTE: Only use when a timeline is currently not available)&lt;br /&gt;
|-&lt;br /&gt;
|before&lt;br /&gt;
|Use to list the time span that comes before the time span in question. (NOTE: Only use when a timeline is currently not available)&lt;br /&gt;
|-&lt;br /&gt;
|after&lt;br /&gt;
|Use to list the time span that comes after the time span in question. (NOTE: Only use when a timeline is currently not available)&lt;br /&gt;
|-&lt;br /&gt;
|subdivisions&lt;br /&gt;
|Use to list all subdivisions of the geologic time span (NOTE: Only use when a timeline is currently not available)&lt;br /&gt;
|-&lt;br /&gt;
|proposed_boundaries1&lt;br /&gt;
|Use to list a possible redefinition of the timespan's borders (see [[Siderian]] for and example)&lt;br /&gt;
|-&lt;br /&gt;
|proposed_boundaries1_ref&lt;br /&gt;
|Use to list the group/individual who proposed the possible redefinition.&lt;br /&gt;
|-&lt;br /&gt;
|proposed_subdivision1&lt;br /&gt;
|Use to list a proposed subdivision of the time span.&lt;br /&gt;
|-&lt;br /&gt;
|proposed_subdivision1_coined&lt;br /&gt;
|Use to list the group/individual who proposed the subdivision.&lt;br /&gt;
|-&lt;br /&gt;
|proposed_part1&lt;br /&gt;
|Use to list a subdivision of time that the time span has been proposed to become part of. (See [[Siderian]] for example usage)&lt;br /&gt;
|-&lt;br /&gt;
|proposed_part1_ref&lt;br /&gt;
|Use to list the group/individual who proposed the change.&lt;br /&gt;
|-&lt;br /&gt;
|proposed_subdivision1&lt;br /&gt;
|A subdivision that was proposed for the individual time span.&lt;br /&gt;
|-&lt;br /&gt;
|proposed_subdivision1_coined&lt;br /&gt;
|The original proposer(s) of the subdivision&lt;br /&gt;
|-&lt;br /&gt;
|former_subdivisions&lt;br /&gt;
|Use to list all subdivisions of the geologic time span that are no longer used with the time span.&lt;br /&gt;
|-&lt;br /&gt;
|formerly_part_of&lt;br /&gt;
|Use to list all geologic time spans that the article's topic was originally part of.&lt;br /&gt;
|-&lt;br /&gt;
|partially_contained_in&lt;br /&gt;
|Use to list all geologic time spans that the article topic's bounds cross (See Example)&lt;br /&gt;
|-&lt;br /&gt;
|partially_contains&lt;br /&gt;
|Use to list all geologic time span subdivisions that the article topic's bounds cross&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Etymology Parameters ===&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
&amp;lt;!--Etymology--&amp;gt;&lt;br /&gt;
| chrono_name                  = ''chrono_name''&lt;br /&gt;
| strat_name                   = ''strat_name''&lt;br /&gt;
| name_formality               = ''name_formality''&lt;br /&gt;
| name_accept_date             = ''name_accept_date''&lt;br /&gt;
| alternate_spellings          = ''alternate_spellings''&lt;br /&gt;
| synonym1                     = ''synonym1''&lt;br /&gt;
| synonym1_coined              = ''synonym1_coined''&lt;br /&gt;
| synonym2                     = ''synonym2''&lt;br /&gt;
| synonym2_coined              = ''synonym2_coined''&lt;br /&gt;
| synonym3                     = ''synonym3''&lt;br /&gt;
| synonym3_coined              = ''synonym3_coined''&lt;br /&gt;
| nicknames                    = ''nicknames''&lt;br /&gt;
| former_names                 = ''former_names''&lt;br /&gt;
| proposed_names               = ''proposed_names''&lt;br /&gt;
}}&lt;br /&gt;
The following parameters produce results that display in the &amp;quot;Etymology&amp;quot; section of the infobox. (Note that &amp;quot;synonym1&amp;quot; and &amp;quot;synonym1_coined&amp;quot; are the first in a series of parameters that goes sequentially in name (synonym2 and synonym2_coined, etc). They are not listed to avoid redundancy.)&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|+Naming Parameters&lt;br /&gt;
!Parameter&lt;br /&gt;
!Function&lt;br /&gt;
|-&lt;br /&gt;
|chrono_name&lt;br /&gt;
|Geochronological name for the time span in question.&lt;br /&gt;
|-&lt;br /&gt;
|strat_name&lt;br /&gt;
|Chronostratigraphic Name&lt;br /&gt;
|-&lt;br /&gt;
|name_formality&lt;br /&gt;
|Whether the name given to the timespan is a placeholder (informal) or is a final name (formal). (mainly used for ICS time spans)&lt;br /&gt;
|-&lt;br /&gt;
|name_accept_date&lt;br /&gt;
|Name ratification date. Used mainly for ICS time subdivisons, though it can be used if there is a regional organization that accepted its usage.&lt;br /&gt;
|-&lt;br /&gt;
|alternate_spellings&lt;br /&gt;
|Alternate Spellings for the geologic time span.&lt;br /&gt;
|-&lt;br /&gt;
|synonym1&lt;br /&gt;
|A synonym for the time span's accepted name.&lt;br /&gt;
|-&lt;br /&gt;
|synonym1coined&lt;br /&gt;
|The original proposer(s) of the synonym&lt;br /&gt;
|-&lt;br /&gt;
|nicknames&lt;br /&gt;
|Use to list nicknames for the time span. (Example: the Mesozoic has often been deemed in popular culture as the &amp;quot;Age of Dinosaurs&amp;quot;)&lt;br /&gt;
|-&lt;br /&gt;
|former_names&lt;br /&gt;
|Formerly used names for the geologic time span.&lt;br /&gt;
|-&lt;br /&gt;
|proposed_names&lt;br /&gt;
|Proposed names for the geologic time span.&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Usage Information Parameters ===&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
&amp;lt;!--Usage Information--&amp;gt; &lt;br /&gt;
| celestial_body               = ''celestial_body''&lt;br /&gt;
| usage                        = ''usage''&lt;br /&gt;
| timescales_used              = ''timescales_used''&lt;br /&gt;
| formerly_used_by             = ''formerly_used_by''&lt;br /&gt;
| not_used_by                  = ''not_used_by''&lt;br /&gt;
}}&lt;br /&gt;
The following parameters produce results that display in the &amp;quot;Usage Information&amp;quot; section of the infobox.&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|+Usage Information Parameters&lt;br /&gt;
!Parameter&lt;br /&gt;
!Function&lt;br /&gt;
|-&lt;br /&gt;
|celestial_body&lt;br /&gt;
|The celestial body to which the time span applies. Some celestial objects will automatically link to their respective articles when entered (upper/lower case ignored). These are:&amp;lt;br/&amp;gt;&lt;br /&gt;
- Mercury&amp;lt;br/&amp;gt;&lt;br /&gt;
- Venus&amp;lt;br/&amp;gt;&lt;br /&gt;
- Earth&amp;lt;br/&amp;gt;&lt;br /&gt;
- Moon&amp;lt;br/&amp;gt;&lt;br /&gt;
- Mars&lt;br /&gt;
|-&lt;br /&gt;
|usage&lt;br /&gt;
|How the time span in question is used (it applies only regionally, globally, is only a proposed subdivision, etc.)&lt;br /&gt;
|-&lt;br /&gt;
|timescales_used&lt;br /&gt;
|What timescales the time span is used in. (i.e North American, ICS)&lt;br /&gt;
|-&lt;br /&gt;
|used_by&lt;br /&gt;
|Specific countries/entities that use the time span officially. &amp;lt;br/&amp;gt;('''NOTE:''' Only use if a minority of countries/entities use the time span officially! Any officially ratified ICS time interval should '''NOT''' use this parameter.)&lt;br /&gt;
|-&lt;br /&gt;
|formerly_used_by&lt;br /&gt;
|Use only if the time span was once used in an official capacity by one country/entity, but has fallen out of favor.&lt;br /&gt;
|-&lt;br /&gt;
|not_used_by&lt;br /&gt;
|Specific countries/entities that do not use the time span officially. &amp;lt;br/&amp;gt;('''NOTE:''' Only use if a minority of countries/entities don't use the time span officially! Unlike the above &amp;quot;used_by&amp;quot; parameter, this can be used with officially ratified ICS time intervals, but only if applicable).&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Definition Parameters ===&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
&amp;lt;!--Definition--&amp;gt;&lt;br /&gt;
| chrono_unit                  = ''chrono_unit''&lt;br /&gt;
| strat_unit                   = ''strat_unit''&lt;br /&gt;
| proposed_by                  = ''proposed_by''&lt;br /&gt;
| type_section                 = ''type_section''&lt;br /&gt;
| timespan_formality           = ''timespan_formality''&lt;br /&gt;
| lower_boundary_def           = ''lower_boundary_def''&lt;br /&gt;
| lower_def_candidates         = ''lower_def_candidates''&lt;br /&gt;
| lower_gssp_candidates        = ''lower_gssp_candidates''&lt;br /&gt;
| lower_gssp_location          = ''lower_gssp_location''&lt;br /&gt;
| lower_gssp_coords            = ''lower_gssp_coords''&lt;br /&gt;
| lower_gssp_accept_date       = ''lower_gssp_accept_date''&lt;br /&gt;
| upper_boundary_def           = ''upper_boundary_def''&lt;br /&gt;
| upper_def_candidates         = ''upper_def_candidates''&lt;br /&gt;
| upper_gssp_candidates        = ''upper_gssp_candidates''&lt;br /&gt;
| upper_gssp_location          = ''upper_gssp_location''&lt;br /&gt;
| upper_gssp_coords            = ''upper_gssp_coords''&lt;br /&gt;
| upper_gssp_accept_date       = ''upper_gssp_accept_date''&lt;br /&gt;
}}&lt;br /&gt;
The following parameters produce results that display in the &amp;quot;Definition&amp;quot; section of the infobox.&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|+Definition Parameters&lt;br /&gt;
!Parameter&lt;br /&gt;
!Function&lt;br /&gt;
|-&lt;br /&gt;
|chrono_unit&lt;br /&gt;
|The chronostratigraphic classification of the time span (i.e era, period, epoch, etc.)&lt;br /&gt;
|-&lt;br /&gt;
|strat_unit&lt;br /&gt;
|The stratigraphic classification of the time span (i.e erathem, system, series, etc.)&lt;br /&gt;
|-&lt;br /&gt;
|proposed_by&lt;br /&gt;
|First proposer of the time span.&lt;br /&gt;
|-&lt;br /&gt;
|timespan_formality&lt;br /&gt;
|Whether the timespan ''as a whole'' is considered a formal or informal division of time. For name formality, see Etymology.&lt;br /&gt;
|-&lt;br /&gt;
|type_section&lt;br /&gt;
|The section of rock originally used to describe the time span in question. See [[Type locality (geology)]] for a more detailed explanation.&lt;br /&gt;
|-&lt;br /&gt;
|lower_boundary_def&lt;br /&gt;
|The critical event (biological, geological, etc.) that marks the start of the time span.&lt;br /&gt;
|-&lt;br /&gt;
|lower_gssp_location&lt;br /&gt;
|The location of the GSSP for the lower boundary of the time span. &amp;lt;br/&amp;gt;('''NOTE:''' This should be used on ICS time span articles only. Non-ICS time spans '''''should not''''' use this parameter.)&lt;br /&gt;
|-&lt;br /&gt;
|lower_gssp_coords&lt;br /&gt;
|The coordinates of the gssp of the lower boundary of the time span. Use [[Template:Coord]] to fill this value.&amp;lt;br/&amp;gt;('''NOTE:''' This should be used on ICS time span articles only. Non-ICS time spans '''''should not''''' use this parameter.)&lt;br /&gt;
|-&lt;br /&gt;
|lower_gssp_accept_date&lt;br /&gt;
|The date the GSSP for the lower boundary of the time span was accepted. &amp;lt;br/&amp;gt;('''NOTE:''' This should be used on ICS time span articles only. Non-ICS time spans '''''should not''''' use this parameter.)&lt;br /&gt;
|-&lt;br /&gt;
|lower_stratotype_location&lt;br /&gt;
|The location of the stratotype for the lower boundary of the time span. &amp;lt;br/&amp;gt;('''''NOTE:''''' use this parameter only on non-ICS time span articles.)&lt;br /&gt;
|-&lt;br /&gt;
|upper_boundary_def&lt;br /&gt;
|The critical event (biological, geological, etc.) that marks the end of the time span. &lt;br /&gt;
|-&lt;br /&gt;
|upper_gssp_location&lt;br /&gt;
|The location of the GSSP for the upper boundary of the time span.&amp;lt;br/&amp;gt;('''NOTE:''' This should be used on ICS time span articles only. Non-ICS time spans '''''should not''''' use this parameter.)&lt;br /&gt;
|-&lt;br /&gt;
|upper_gssp_coords&lt;br /&gt;
|The coordinates of the gssp of the upper boundary of the time span. Use [[Template:Coord]] to fill this value.&amp;lt;br/&amp;gt;('''NOTE:''' This should be used on ICS time span articles only. Non-ICS time spans '''''should not''''' use this parameter.)&lt;br /&gt;
|-&lt;br /&gt;
|upper_gssp_accept_date&lt;br /&gt;
|The date the GSSP for the upper boundary of the time span was accepted. &amp;lt;br/&amp;gt;('''NOTE:''' This should be used on ICS time span articles only. Non-ICS time spans '''''should not''''' use this parameter.)&lt;br /&gt;
|-&lt;br /&gt;
|upper_stratotype_location&lt;br /&gt;
|The location of the stratotype for the upper boundary of the time span. &amp;lt;br/&amp;gt;('''''NOTE:''''' use this parameter only on non-ICS time span articles.)&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
=== Atmospheric and Climatic Data Parameters ===&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
&amp;lt;!--Atmospheric and Climatic Data--&amp;gt;&lt;br /&gt;
| o2                           = 42&lt;br /&gt;
| co2                          = 43&lt;br /&gt;
| temp                         = 44&lt;br /&gt;
| sea_level                    = ''sea_level''&lt;br /&gt;
}}&lt;br /&gt;
The following parameters produce results that display in the &amp;quot;Atmospheric and Climatic Data&amp;quot; section of the infobox.&lt;br /&gt;
{| class=&amp;quot;wikitable sortable&amp;quot;&lt;br /&gt;
|+Atmospheric and Climatic Data Parameters&lt;br /&gt;
!Parameter&lt;br /&gt;
!Function&lt;br /&gt;
|-&lt;br /&gt;
|o2&lt;br /&gt;
|Mean atmospheric [[Oxygen|{{chem|O|2}}]] content over the time span's duration as a percentage of modern level.&lt;br /&gt;
|-&lt;br /&gt;
|co2&lt;br /&gt;
|Mean atmospheric [[Carbon dioxide|{{chem|CO|2}}]] content over the time span's duration in parts per million (ppm).&lt;br /&gt;
|-&lt;br /&gt;
|temp&lt;br /&gt;
|Mean surface temperature over time span duration in °C.&lt;br /&gt;
|-&lt;br /&gt;
|sea_level&lt;br /&gt;
|Sea level above present day.&lt;br /&gt;
|-&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
== Blank Syntax (ICS Time Span)==&lt;br /&gt;
&amp;lt;pre style=&amp;quot;overflow:auto&amp;quot;&amp;gt;&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
| name                         = &lt;br /&gt;
| color                        =&lt;br /&gt;
| top_bar                      =&lt;br /&gt;
| time_start                   =&lt;br /&gt;
| time_start_prefix            =&lt;br /&gt;
| time_start_uncertainty       =&lt;br /&gt;
| time_end                     =&lt;br /&gt;
| time_end_prefix              =&lt;br /&gt;
| time_end_uncertainty         =&lt;br /&gt;
| image_map                    =&lt;br /&gt;
| caption_map                  =&lt;br /&gt;
| image_outcrop                =&lt;br /&gt;
| caption_outcrop              =&lt;br /&gt;
| image_art                    =&lt;br /&gt;
| caption_art                  =&lt;br /&gt;
&amp;lt;!--Chronology--&amp;gt;  &lt;br /&gt;
| timeline                     =&lt;br /&gt;
| proposed_boundaries1         =&lt;br /&gt;
| proposed_boundaries1_ref     =&lt;br /&gt;
| proposed_boundaries2         =&lt;br /&gt;
| proposed_boundaries2_ref     =&lt;br /&gt;
| proposed_boundaries3         =&lt;br /&gt;
| proposed_boundaries3_ref     =&lt;br /&gt;
| proposed_subdivision1        =&lt;br /&gt;
| proposed_subdivision1_coined =&lt;br /&gt;
| proposed_subdivision2        =&lt;br /&gt;
| proposed_subdivision2_coined =&lt;br /&gt;
| proposed_subdivision3        =&lt;br /&gt;
| proposed_subdivision3_coined =&lt;br /&gt;
| former_subdivisions          =&lt;br /&gt;
| formerly_part_of             =&lt;br /&gt;
| partially_contained_in       =&lt;br /&gt;
| partially_contains           =&lt;br /&gt;
&amp;lt;!--Etymology--&amp;gt;&lt;br /&gt;
| chrono_name                  =&lt;br /&gt;
| strat_name                   =&lt;br /&gt;
| name_formality               =&lt;br /&gt;
| name_accept_date             =&lt;br /&gt;
| alternate_spellings          =&lt;br /&gt;
| synonym1                     =&lt;br /&gt;
| synonym1_coined              =&lt;br /&gt;
| synonym2                     =&lt;br /&gt;
| synonym2_coined              =&lt;br /&gt;
| synonym3                     =&lt;br /&gt;
| synonym3_coined              =&lt;br /&gt;
| nicknames                    =&lt;br /&gt;
| former_names                 =&lt;br /&gt;
| proposed_names               =&lt;br /&gt;
&amp;lt;!--Usage Information--&amp;gt; &lt;br /&gt;
| celestial_body               = earth&lt;br /&gt;
| usage                        = Global ([[International Commission on Stratigraphy|ICS]])&lt;br /&gt;
| timescales_used              = ICS Time Scale&lt;br /&gt;
| formerly_used_by             =&lt;br /&gt;
| not_used_by                  =&lt;br /&gt;
&amp;lt;!--Definition--&amp;gt;&lt;br /&gt;
| chrono_unit                  =&lt;br /&gt;
| strat_unit                   =&lt;br /&gt;
| proposed_by                  =&lt;br /&gt;
| type_section                 =&lt;br /&gt;
| timespan_formality           =&lt;br /&gt;
| lower_boundary_def           =&lt;br /&gt;
| lower_def_candidates         =&lt;br /&gt;
| lower_gssp_candidates        =&lt;br /&gt;
| lower_gssp_location          =&lt;br /&gt;
| lower_gssp_coords            =&lt;br /&gt;
| lower_gssp_accept_date       =&lt;br /&gt;
| upper_boundary_def           =&lt;br /&gt;
| upper_def_candidates         =&lt;br /&gt;
| upper_gssp_candidates        =&lt;br /&gt;
| upper_gssp_location          =&lt;br /&gt;
| upper_gssp_coords            =&lt;br /&gt;
| upper_gssp_accept_date       =&lt;br /&gt;
&amp;lt;!--Atmospheric and Climatic Data--&amp;gt;&lt;br /&gt;
| o2                           =&lt;br /&gt;
| co2                          =&lt;br /&gt;
| temp                         =&lt;br /&gt;
| sea_level                    =&lt;br /&gt;
}}&amp;lt;/pre&amp;gt;&lt;br /&gt;
&lt;br /&gt;
== Blank Syntax (General/Other)==&lt;br /&gt;
&amp;lt;pre style=&amp;quot;overflow:auto&amp;quot;&amp;gt;&lt;br /&gt;
{{Infobox geologic timespan&lt;br /&gt;
| name                         = &lt;br /&gt;
| color                        =&lt;br /&gt;
| manual_color                 =&lt;br /&gt;
| top_bar                      =&lt;br /&gt;
| time_start                   =&lt;br /&gt;
| time_start_prefix            =&lt;br /&gt;
| time_start_uncertainty       =&lt;br /&gt;
| time_end                     =&lt;br /&gt;
| time_end_prefix              =&lt;br /&gt;
| time_end_uncertainty         =&lt;br /&gt;
| earliest                     =&lt;br /&gt;
| latest                       =&lt;br /&gt;
| top_bar_ref                  =&lt;br /&gt;
| top_bar_prefix               =&lt;br /&gt;
| top_bar_ps                   =&lt;br /&gt;
| image_map                    =&lt;br /&gt;
| caption_map                  =&lt;br /&gt;
| image_outcrop                =&lt;br /&gt;
| caption_outcrop              =&lt;br /&gt;
| image_art                    =&lt;br /&gt;
| caption_art                  =&lt;br /&gt;
&amp;lt;!--Chronology--&amp;gt;&lt;br /&gt;
| timeline                     =&lt;br /&gt;
| subdivisions                 =&lt;br /&gt;
| proposed_subdivision1        =&lt;br /&gt;
| proposed_subdivision1_coined =&lt;br /&gt;
| proposed_subdivision2        =&lt;br /&gt;
| proposed_subdivision2_coined =&lt;br /&gt;
| proposed_subdivision3        =&lt;br /&gt;
| proposed_subdivision3_coined =&lt;br /&gt;
| former_subdivisions          =&lt;br /&gt;
| formerly_part_of             =&lt;br /&gt;
| partially_contained_in       =&lt;br /&gt;
| partially_contains           =&lt;br /&gt;
&amp;lt;!--Etymology--&amp;gt;&lt;br /&gt;
| chrono_name                  =&lt;br /&gt;
| strat_name                   =&lt;br /&gt;
| alternate_spellings          =&lt;br /&gt;
| synonym1                     =&lt;br /&gt;
| synonym1_coined              =&lt;br /&gt;
| synonym2                     =&lt;br /&gt;
| synonym2_coined              =&lt;br /&gt;
| synonym3                     =&lt;br /&gt;
| synonym3_coined              =&lt;br /&gt;
| former_names                 =&lt;br /&gt;
| proposed_names               =&lt;br /&gt;
&amp;lt;!--Usage Information--&amp;gt;&lt;br /&gt;
| celestial_body               =&lt;br /&gt;
| usage                        =&lt;br /&gt;
| timescales_used              =&lt;br /&gt;
| used_by                      =&lt;br /&gt;
| formerly_used_by             =&lt;br /&gt;
| not_used_by                  =&lt;br /&gt;
&amp;lt;!--Definition--&amp;gt;&lt;br /&gt;
| chrono_unit                  =&lt;br /&gt;
| strat_unit                   =&lt;br /&gt;
| proposed_by                  =&lt;br /&gt;
| type_section                 =&lt;br /&gt;
| lower_boundary_def           =&lt;br /&gt;
| lower_stratotype_location    =&lt;br /&gt;
| upper_boundary_def           =&lt;br /&gt;
| upper_stratotype_location    =&lt;br /&gt;
&amp;lt;!--Atmospheric and Climatic Data--&amp;gt;&lt;br /&gt;
| o2                           =&lt;br /&gt;
| co2                          =&lt;br /&gt;
| temp                         =&lt;br /&gt;
| sea_level                    =&lt;br /&gt;
}}&amp;lt;/pre&amp;gt;&lt;br /&gt;
&lt;br /&gt;
==Tracking categories==&lt;br /&gt;
* {{clc|Pages using infobox geologic timespan with unknown parameters}}&lt;br /&gt;
&lt;br /&gt;
&amp;lt;includeonly&amp;gt;{{sandbox other||&lt;br /&gt;
&amp;lt;!-- Categories below this line; interwikis at Wikidata --&amp;gt;&lt;br /&gt;
[[Category:Geology infobox templates|Timespan]]&lt;br /&gt;
}}&amp;lt;/includeonly&amp;gt;&lt;/div&gt;</summary>
		<author><name>imported&gt;John of Reading</name></author>
	</entry>
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