Template:Geological history of Earth

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Usage guidelineEdit

By consensus at Wikipedia:WikiProject Geology, this template should only be used on the articles about geological time periods that it links to. It should not be used in categories, nor for extinct taxa, nor geological formations.

Initial visibility: currently defaults to autocollapse

To set this template's initial visibility, the |state= parameter may be used:

  • |state=collapsed: {{Geological history of Earth|state=collapsed}} to show the template collapsed, i.e., hidden apart from its title bar
  • |state=expanded: {{Geological history of Earth|state=expanded}} to show the template expanded, i.e., fully visible
  • |state=autocollapse: {{Geological history of Earth|state=autocollapse}}
    • shows the template collapsed to the title bar if there is a {{navbar}}, a {{sidebar}}, or some other table on the page with the collapsible attribute
    • shows the template in its expanded state if there are no other collapsible items on the page

If the |state= parameter in the template on this page is not set, the template's initial visibility is taken from the |default= parameter in the Collapsible option template. For the template on this page, that currently evaluates to autocollapse.


  • Cohen, K.M.; Finney, S.C.; Gibbard, P.L.; Fan, J.-X. (2013). "The ICS International Chronostratigraphic Chart" (PDF). 2017/02. pp. 199–204.
  • U.S. Geological Survey Geologic Names Committee. "Divisions of Geologic Time—Major Chronostratigraphic and Geochronologic Units" (PDF). USGS. Fact Sheet 2007-3015. Retrieved 10 March 2013.