Usage  এই তথ্যছকটি নিবন্ধের ডানপাশে প্রদর্শিত হবে। নিম্নোক্ত বিষয়গুলো দেখাতে এটি ব্যবহার করা যেতে পারে: ক) ভূতাত্ত্বিক নির্দিষ্ট সময়কালের সাধারণ ব্যবহারের ক্ষেত্রে  খ) ভূতাত্ত্বিক সময়ের আঞ্চলিকভাবে ব্যবহৃত উপবিভাগ দেখাতে  c) proposed subdivisions of geologic time (i.e Chaotian),  d) subdivisions of extraterrestrial geologic time (i.e Nectarian).    প্যারমিটার সমূহ    Header and Title Parameters  The following parameters control the images, horizontal timeline bar, and title text at the top of the infobox template. +Header and Title ParametersParameterFunctionnameThe text at the top of the template.colorDetermines 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.manual_colorSets the color behind the title with RGB values.accessibleTurns the title text white. Use on articles where the time span's color does not have enough contrast with the default black title text.top_barDetermines the variety of horizontal timeline bar below the title text. Defaults to a horizontal Phanerozoic timeline when not invoked. Current accepted values are: - mercury/mercurial (Mercurial geologic timeline) - moon/lunar (Lunar geologic timeline) - mars/martian (Martian geologic timeline) - long fossil/long/all time (complete timeline of earth's history) (NOTE: Upper/lower case does not matter for these values.)earliestAdds 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.  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.latestAdds 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. 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.top_bar_refInserts a reference into the text above the timeline bar.time_startThe time when the geologic time span starts, in millions of years.time_start_prefixUsed to add a ~ in front of the displayed numerical start time. Should not be used for other purposes.time_start_uncertaintyThe level of uncertainty on the measurement of time span start time.time_endThe time when the geologic time span ends, in millions of years.time_end_prefixUsed to add a ~ in front of the displayed numerical end time. Should not be used for other purposes.time_end_uncertaintyThe level of uncertainty on the measurement of time span end time.top_bar_prefixAdds text before the "xxx Ma" text above the horizontal timeline. It is recommended not to use this parameter unless absolutely necesary. See Template:Geological range for more information.top_bar_psAdds text after the "xxx Ma" text above the horizontal timeline. It is recommended not to use this parameter unless absolutely necessary. See Template:Geological range for more information.image_mapReconstruction of the Earth as it appeared during the geologic time span.caption_mapCaption for the above image.image_outcropPicture of a rock outcrop with rocks dating to the geologic time span.caption_outcropCaption for the above image.image_artReconstruction of a landscape/ecosystem as it may have appeared during the time span.caption_artCaption for the above image.  Chronology Parameters The following parameters produce results that display in the "Chronology" section of the infobox. (Note that "proposed_subdivision1" and "proposed_subdivision1_coined" 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.) +Chronology ParametersParameterFunctiontimelinePlaces a pre-made vertical timeline in the infobox.part_ofUse 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)beforeUse to list the time span that comes before the time span in question. (NOTE: Only use when a timeline is currently not available)afterUse to list the time span that comes after the time span in question. (NOTE: Only use when a timeline is currently not available)subdivisionsUse to list all subdivisions of the geologic time span (NOTE: Only use when a timeline is currently not available)proposed_boundaries1Use to list a possible redefinition of the timespan's borders (see Siderian for and example)proposed_boundaries1_refUse to list the group/individual who proposed the possible redefinition.proposed_subdivision1Use to list a proposed subdivision of the time span.proposed_subdivision1_coinedUse to list the group/individual who proposed the subdivision.proposed_part1Use to list a subdivision of time that the time span has been proposed to become part of. (See Siderian for example usage)proposed_part1_refUse to list the group/individual who proposed the change.proposed_subdivision1A subdivision that was proposed for the individual time span.proposed_subdivision1_coinedThe original proposer(s) of the subdivisionformer_subdivisionsUse to list all subdivisions of the geologic time span that are no longer used with the time span.formerly_part_ofUse to list all geologic time spans that the article's topic was originally part of.partially_contained_inUse to list all geologic time spans that the article topic's bounds cross (See Example)partially_containsUse to list all geologic time span subdivisions that the article topic's bounds cross   Etymology Parameters  The following parameters produce results that display in the "Etymology" section of the infobox. (Note that "synonym1" and "synonym1_coined" 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.) +Naming ParametersParameterFunctionchrono_nameGeochronological name for the time span in question.strat_nameChronostratigraphic Namename_formalityWhether the name given to the timespan is a placeholder (informal) or is a final name (formal). (mainly used for ICS time spans)name_accept_dateName ratification date. Used mainly for ICS time subdivisons, though it can be used if there is a regional organization that accepted its usage.alternate_spellingsAlternate Spellings for the geologic time span.synonym1A synonym for the time span's accepted name.synonym1coinedThe original proposer(s) of the synonymnicknamesUse to list nicknames for the time span. (Example: the Mesozoic has often been deemed in popular culture as the "Age of Dinosaurs")former_namesFormerly used names for the geologic time span.proposed_namesProposed names for the geologic time span.   Usage Information Parameters  The following parameters produce results that display in the "Usage Information" section of the infobox. +Usage Information ParametersParameterFunctioncelestial_bodyThe 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: - Mercury - Venus - Earth - Moon - MarsusageHow the time span in question is used (it applies only regionally, globally, is only a proposed subdivision, etc.)timescales_usedWhat timescales the time span is used in. (i.e North American, ICS)used_bySpecific countries/entities that use the time span officially. (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.)formerly_used_byUse only if the time span was once used in an official capacity by one country/entity, but has fallen out of favor.not_used_bySpecific countries/entities that do not use the time span officially. (NOTE: Only use if a minority of countries/entities don't use the time span officially! Unlike the above "used_by" parameter, this can be used with officially ratified ICS time intervals, but only if applicable).   Definition Parameters  The following parameters produce results that display in the "Definition" section of the infobox. +Definition ParametersParameterFunctionchrono_unitThe chronostratigraphic classification of the time span (i.e era, period, epoch, etc.)strat_unitThe stratigraphic classification of the time span (i.e erathem, system, series, etc.)proposed_byFirst proposer of the time span.timespan_formalityWhether the timespan as a whole is considered a formal or informal division of time. For name formality, see Etymology.type_sectionThe section of rock originally used to describe the time span in question. See Type locality (geology) for a more detailed explanation.lower_boundary_defThe critical event (biological, geological, etc.) that marks the start of the time span.lower_gssp_locationThe location of the GSSP for the lower boundary of the time span. (NOTE: This should be used on ICS time span articles only. Non-ICS time spans should not use this parameter.)lower_gssp_coordsThe coordinates of the gssp of the lower boundary of the time span. Use Template:Coord to fill this value.(NOTE: This should be used on ICS time span articles only. Non-ICS time spans should not use this parameter.)lower_gssp_accept_dateThe date the GSSP for the lower boundary of the time span was accepted. (NOTE: This should be used on ICS time span articles only. Non-ICS time spans should not use this parameter.)lower_stratotype_locationThe location of the stratotype for the lower boundary of the time span. (NOTE: use this parameter only on non-ICS time span articles.)upper_boundary_defThe critical event (biological, geological, etc.) that marks the end of the time span. upper_gssp_locationThe location of the GSSP for the upper boundary of the time span.(NOTE: This should be used on ICS time span articles only. Non-ICS time spans should not use this parameter.)upper_gssp_coordsThe coordinates of the gssp of the upper boundary of the time span. Use Template:Coord to fill this value.(NOTE: This should be used on ICS time span articles only. Non-ICS time spans should not use this parameter.)upper_gssp_accept_dateThe date the GSSP for the upper boundary of the time span was accepted. (NOTE: This should be used on ICS time span articles only. Non-ICS time spans should not use this parameter.)upper_stratotype_locationThe location of the stratotype for the upper boundary of the time span. (NOTE: use this parameter only on non-ICS time span articles.)   Atmospheric and Climatic Data Parameters  The following parameters produce results that display in the "Atmospheric and Climatic Data" section of the infobox. +Atmospheric and Climatic Data ParametersParameterFunctiono2Mean atmospheric  content over the time span's duration as a percentage of modern level.co2Mean atmospheric  content over the time span's duration in parts per million (ppm).tempMean surface temperature over time span duration in °C.sea_levelSea level above present day.   Blank Syntax (ICS Time Span) {{Infobox geologic timespan | name                         =  | color                        = | top_bar                      = | time_start                   = | time_start_prefix            = | time_start_uncertainty       = | time_end                     = | time_end_prefix              = | time_end_uncertainty         = | image_map                    = | caption_map                  = | image_outcrop                = | caption_outcrop              = | image_art                    = | caption_art                  = <!--Chronology-->   | timeline                     = | proposed_boundaries1         = | proposed_boundaries1_ref     = | proposed_boundaries2         = | proposed_boundaries2_ref     = | proposed_boundaries3         = | proposed_boundaries3_ref     = | proposed_subdivision1        = | proposed_subdivision1_coined = | proposed_subdivision2        = | proposed_subdivision2_coined = | proposed_subdivision3        = | proposed_subdivision3_coined = | former_subdivisions          = | formerly_part_of             = | partially_contained_in       = | partially_contains           = <!--Etymology--> | chrono_name                  = | strat_name                   = | name_formality               = | name_accept_date             = | alternate_spellings          = | synonym1                     = | synonym1_coined              = | synonym2                     = | synonym2_coined              = | synonym3                     = | synonym3_coined              = | nicknames                    = | former_names                 = | proposed_names               = <!--Usage Information-->  | celestial_body               = earth | usage                        = Global ([[International Commission on Stratigraphy|ICS]]) | timescales_used              = ICS Time Scale | formerly_used_by             = | not_used_by                  = <!--Definition--> | chrono_unit                  = | strat_unit                   = | proposed_by                  = | type_section                 = | timespan_formality           = | lower_boundary_def           = | lower_def_candidates         = | lower_gssp_candidates        = | lower_gssp_location          = | lower_gssp_coords            = | lower_gssp_accept_date       = | upper_boundary_def           = | upper_def_candidates         = | upper_gssp_candidates        = | upper_gssp_location          = | upper_gssp_coords            = | upper_gssp_accept_date       = <!--Atmospheric and Climatic Data--> | o2                           = | co2                          = | temp                         = | sea_level                    = }}   Blank Syntax (General/Other) {{Infobox geologic timespan | name                         =  | color                        = | manual_color                 = | top_bar                      = | time_start                   = | time_start_prefix            = | time_start_uncertainty       = | time_end                     = | time_end_prefix              = | time_end_uncertainty         = | earliest                     = | latest                       = | top_bar_ref                  = | top_bar_prefix               = | top_bar_ps                   = | image_map                    = | caption_map                  = | image_outcrop                = | caption_outcrop              = | image_art                    = | caption_art                  = <!--Chronology--> | timeline                     = | subdivisions                 = | proposed_subdivision1        = | proposed_subdivision1_coined = | proposed_subdivision2        = | proposed_subdivision2_coined = | proposed_subdivision3        = | proposed_subdivision3_coined = | former_subdivisions          = | formerly_part_of             = | partially_contained_in       = | partially_contains           = <!--Etymology--> | chrono_name                  = | strat_name                   = | alternate_spellings          = | synonym1                     = | synonym1_coined              = | synonym2                     = | synonym2_coined              = | synonym3                     = | synonym3_coined              = | former_names                 = | proposed_names               = <!--Usage Information--> | celestial_body               = | usage                        = | timescales_used              = | used_by                      = | formerly_used_by             = | not_used_by                  = <!--Definition--> | chrono_unit                  = | strat_unit                   = | proposed_by                  = | type_section                 = | lower_boundary_def           = | lower_stratotype_location    = | upper_boundary_def           = | upper_stratotype_location    = <!--Atmospheric and Climatic Data--> | o2                           = | co2                          = | temp                         = | sea_level                    = }}  Tracking categories    y>