[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-291578-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-291578-en":131},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","international-chronostratigraphic-chart-v-202606-gssp-numerical-age-ma","International Chronostratigraphic Chart - v 2026/06 - GSSP numerical age (Ma)","","International Chronostratigraphic Chart (v 2026/06) presents the geological time scale using GSSP and GSSA markers for lower boundaries across eons, eras, systems, and periods. The chart lists numerical ages in Ma alongside stratigraphic rankings such as Phanerozoic subdivisions (Cenozoic, Mesozoic, Paleozoic), major periods (Quaternary, Neogene, Paleogene, Jurassic, Cretaceous, Cambrian, etc.), and corresponding stage-level names. It also includes Precambrian eon divisions and summarizes that units are being defined through GSSP for global boundary section and point definitions.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & 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chart provide for each stratigraphic unit?","Question",{"text":63,"@type":64},"It provides numerical age values in Ma and associates them with stratigraphic boundary concepts using GSSP/GSSA, spanning eons to systems and periods (including stage-level names shown in the table).","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How are GSSP and GSSA used in the chart?",{"text":68,"@type":64},"GSSP marks lower boundaries for units that are being defined by Global Boundary Stratotype Section and Points, while GSSA refers to the standard global stratigraphic ages for certain earlier-defined divisions mentioned in the text.",{"name":70,"@type":61,"acceptedAnswer":71},"What are the main time divisions covered besides the Phanerozoic?",{"text":72,"@type":64},"The chart also covers Precambrian divisions, including Proterozoic subdivisions and Archean and Hadean categories, with corresponding numerical ages or ranges shown.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},291578,1789646053,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,106,111,115,120,123,127],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & 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Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":124,"doc_module":4,"doc_module_name":25,"category_name":125,"show_sort_weight":124,"slug":126},10,"Lifestyle","lifestyle",{"id":128,"doc_module":4,"doc_module_name":25,"category_name":129,"show_sort_weight":97,"slug":130},19,"General","general",{"code":4,"msg":82,"data":132},{"doc_id":79,"user_id":133,"nickname":42,"user_avatar":134,"doc_module":4,"category_id":112,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":22,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":80,"read_time":30,"preview_page_count":4},1236954509970,"https://us-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","INTERNATIONAL CHRONOSTRATIGRAPHIC CHART  \n[www.stratigraphy.org](www.stratigraphy.org) International Commission on Stratigraphy v 2026/06  \nGSSP  \nnumerical age (Ma)  \nnumerical age (Ma)  \nnumerical age (Ma)  \nEonothem / Eon Erathem / Era  \nSystem / Period  \nGSSP  \nGSSA  \nnumerical age (Ma)  \n\n| Phanerozoic | Cenozoic | Quaternary | U/L |  Meghalayan  |\n| --- | --- | --- | --- | --- |\n|  |  |  | Holocene M L/E |  Northgrippian  |\n|  |  |  |  |  Greenlandian  |\n|  |  |  | U/L M\u003Cbr>\u003Cbr>Pleistocene L/E | Upper |\n|  |  |  |  | Chibanian  |\n|  |  |  |  | Calabrian \u003Cbr>|\n|  |  |  |  | Gelasian  |\n|  |  | Neogene | Pliocene\u003Cbr>U/L L/E | Piacenzian  |\n|  |  |  |  | Zanclean  |\n|  |  |  | Miocene\u003Cbr>U/L\u003Cbr>M\u003Cbr>L/E | Messinian  |\n|  |  |  |  | \u003Cbr>Tortonian  |\n|  |  |  |  | Serravallian  |\n|  |  |  |  | Langhian  |\n|  |  |  |  | Burdigalian |\n|  |  |  |  | Aquitanian  |\n|  |  | Paleogene | Oligocene | Chattian\u003Cbr>|\n|  |  |  |  | Rupelian  |\n|  |  |  | Eocene | \u003Cbr>Priabonian  |\n|  |  |  |  | Bartonian |\n|  |  |  |  | Lutetian\u003Cbr>|\n|  |  |  |  | Ypresian \u003Cbr>|\n|  |  |  | Paleocene | Thanetian  |\n|  |  |  |  | Selandian  |\n|  |  |  |  | Danian\u003Cbr>|\n|  | Mesozoic | Cretaceous | Upper | Maastrichtian\u003Cbr>\u003Cbr>|\n|  |  |  |  | Campanian\u003Cbr>\u003Cbr>|\n|  |  |  |  | Santonian  |\n|  |  |  |  | \u003Cbr>Coniacian  |\n|  |  |  |  | \u003Cbr>Turonian  |\n|  |  |  |  | \u003Cbr>Cenomanian  |\n|  |  |  | Lower | \u003Cbr>\u003Cbr>Albian |\n|  |  |  |  | Aptian |\n|  |  |  |  | Barremian  |\n|  |  |  |  | \u003Cbr>Hauterivian  |\n|  |  |  |  | Valanginian  |\n|  |  |  |  | Berriasian |\n\npresent 0.0042  \n0.0082 0.0117 0.129 0.774  \n1.80 2.58  \n3.600 5.333 7.246 11.63 13.82 15.98 20.45 23.04 27.30  \n33.9  \n37.71 41.03  \n48.07  \n56.00 59.24 61.66  \n66.00  \n72.2 ±0.2  \n83.6 ±0.2 85.7 ±0.2  \n89.8 ±0.3 93.9 ±0.2  \n100.5 ±0.1  \n113.2 ±0.3  \n121.4 ±0.6 125.77  \n132.6 ±0.6  \n137.05 ±0.2  \n143.1 ±0.6  \n5th International Congress on Stratigraphy  \nSTRATI 2026  \n\n| Phanerozoic | Mesozoic | Jurassic | Upper |  | Tithonian |\n| --- | --- | --- | --- | --- | --- |\n|  |  |  |  |  | Kimmeridgian  |\n|  |  |  |  |  | Oxfordian |\n|  |  |  | Middle |  | Callovian |\n|  |  |  |  |  | Bathonian  |\n|  |  |  |  |  | Bajocian  |\n|  |  |  |  |  | Aalenian  |\n|  |  |  | Lower |  | Toarcian\u003Cbr>|\n|  |  |  |  |  | Pliensbachian\u003Cbr>\u003Cbr>|\n|  |  |  |  |  | \u003Cbr>\u003Cbr>Sinemurian |\n|  |  |  |  |  | Hettangian  |\n|  |  | Triassic | Upper |  | Rhaetian |\n|  |  |  |  |  | Norian |\n|  |  |  |  |  | \u003Cbr>\u003Cbr>Carnian |\n|  |  |  | Middle |  | Ladinian  |\n|  |  |  |  |  | Anisian |\n|  |  |  | Lower |  | Olenekian |\n|  |  |  |  |  | Induan  |\n|  | Paleozoic | Permian | Lopingian |  | Changhsingian  |\n|  |  |  |  |  | Wuchiapingian |\n|  |  |  | Guadalupian |  | Capitanian  |\n|  |  |  |  |  | Wordian  |\n|  |  |  |  |  | Roadian  |\n|  |  |  | Cisuralian |  | Kungurian |\n|  |  |  |  |  | Artinskian\u003Cbr>\u003Cbr>|\n|  |  |  |  |  | \u003Cbr>Sakmarian  |\n|  |  |  |  |  | Asselian  |\n|  |  | Carboniferous | Pennsylvanian | Upper | Gzhelian |\n|  |  |  |  |  | Kasimovian |\n|  |  |  |  | Middle | Moscovian |\n|  |  |  |  | Lower | \u003Cbr>Bashkirian |\n|  |  |  | Mississippian | Upper | Serpukhovian |\n|  |  |  |  | Middle | \u003Cbr>\u003Cbr>Visean |\n|  |  |  |  | Lower | Tournaisian\u003Cbr>\u003Cbr>|\n\n143.1 ±0.6  \n149.2 ±0.7  \n154.8 ±0.8  \n161.5 ±1.0  \n165.3 ±1.1  \n168.2 ±1.2  \n170.9 ±0.8  \n174.7 ±0.8  \n184.2 ±0.3  \n192.9 ±0.3  \n199.5 ±0.3  \n201.4 ±0.2 ~ 205.7  \n~ 227.3  \n~ 237 241.464 ±0.28  \n247.0  \n250.8 251.902 ±0.024  \n254.14 ±0.07  \n259.857 ±0.084  \n264.28 ±0.16  \n266.9 ±0.4  \n274.4 ±0.4  \n283.3 ±0.4  \n290.1 ±0.26  \n293.52 ±0.17  \n298.9 ±0.15  \n303.7 ±0.1  \n307.0 ±0.1  \n315.2 ±0.2  \n323.4 ±0.4  \n330.3 ±0.4  \n346.7 ±0.4  \n358.86 ±0.19  \n\n| Phanerozoic | Paleozoic | Devonian | Upper | \u003Cbr>\u003Cbr>Famennian |\n| --- | --- | --- | --- | --- |\n|  |  |  |  | Frasnian\u003Cbr>|\n|  |  |  | Middle | Givetian\u003Cbr>|\n|  |  |  |  | Eifelian\u003Cbr>|\n|  |  |  | Lower | Emsian\u003Cbr>|\n|  |  |  |  | Pragian  |\n|  |  |  |  | Lochkovian\u003Cbr>\u003Cbr>|\n|  |  | Silurian | Pridoli | |\n|  |  |  | Ludlow | Ludfordian  |\n|  |  |  ","cbCaib6uK1FPlFh0","https://ap.wps.com/l/cbCaib6uK1FPlFh0","pdf",698578,"English","# Phanerozoic time scale\n## Cenozoic (Quaternary, Neogene, Paleogene)\n## Mesozoic (Triassic, Jurassic, Cretaceous)\n## Paleozoic (Permian, Carboniferous, Devonian, Silurian, Ordovician, Cambrian)\n# Precambrian time scale\n## Proterozoic divisions\n## Archean and Hadean","[{\"question\":\"What information does the chart provide for each stratigraphic unit?\",\"answer\":\"It provides numerical age values in Ma and associates them with stratigraphic boundary concepts using GSSP/GSSA, spanning eons to systems and periods (including stage-level names shown in the table).\"},{\"question\":\"How are GSSP and GSSA used in the chart?\",\"answer\":\"GSSP marks lower boundaries for units that are being defined by Global Boundary Stratotype Section and Points, while GSSA refers to the standard global stratigraphic ages for certain earlier-defined divisions mentioned in the text.\"},{\"question\":\"What are the main time divisions covered besides the Phanerozoic?\",\"answer\":\"The chart also covers Precambrian divisions, including Proterozoic subdivisions and Archean and Hadean categories, with corresponding numerical ages or ranges shown.\"}]","International Chronostratigraphic Chart - v 2026/06 - GSSP numerical age (Ma) | PDF"]