Geologic Time
The Geologic Time Scale (GTS) is an arbitrary chronological arrangement or sequence of geologic events, used as a measure of the relative or absolute duration or age of any part of geologic time, and usually presented in the form of a chart showing the names of the various rock-stratigraphic, time-stratigraphic, or geologic-time units.
The table of geologic time spans presented here agrees primarily with the nomenclature, dates and standard color codes as set forth by the International Commission on Stratigraphy (https://stratigraphy.org/, see also https://en.wikipedia.org/wiki/International_Commission_on_Stratigraphy). This, however, only goes back as far as the age of the Earth (4.54 billion years). A proposal has been made to formally define the periods of the evolution of the Solar System before the Earth was formed going back to approximately 5 billion years. This is added into our chart as the Chaotian period.
See Geologic Time overview: https://www.mindat.org/geotime.php
Phanerozoic: https://www.mindat.org/geotime.php?t=1
And Precambrian: https://www.mindat.org/geotime.php?t=149
Also see: https://www.mindat.org/listgeoevents.php
And the timescale with dates: https://www.geosociety.org/GSA/GSA/timescale/home.aspx
Or https://en.wikipedia.org/wiki/Geologic_time_scale
The table of geologic time spans presented here agrees primarily with the nomenclature, dates and standard color codes as set forth by the International Commission on Stratigraphy (https://stratigraphy.org/, see also https://en.wikipedia.org/wiki/International_Commission_on_Stratigraphy). This, however, only goes back as far as the age of the Earth (4.54 billion years). A proposal has been made to formally define the periods of the evolution of the Solar System before the Earth was formed going back to approximately 5 billion years. This is added into our chart as the Chaotian period.
See Geologic Time overview: https://www.mindat.org/geotime.php
Phanerozoic: https://www.mindat.org/geotime.php?t=1
And Precambrian: https://www.mindat.org/geotime.php?t=149
Also see: https://www.mindat.org/listgeoevents.php
And the timescale with dates: https://www.geosociety.org/GSA/GSA/timescale/home.aspx
Or https://en.wikipedia.org/wiki/Geologic_time_scale
List all geological events
