period: References & Edit History

Article Contributors

Primary Contributors

  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Modified link of Web site: Geosciences LibreTexts - Measuring Geological Time- The Geological Time Scale. Jul 02, 2026
Add new Web site: Geosciences LibreTexts - Measuring Geological Time- The Geological Time Scale. Jan 10, 2026
Add new Web site: Australian Museum - What is the geological time scale? Sep 20, 2025
Added new Web site: Bellarmine University - Geologic Time. Apr 02, 2008
Added new Web site: Earth Science Australia - Geological Timeline. Apr 02, 2008
Added new Web site: Union County College - The Geologic Time Scale. Apr 02, 2008
Added new Web site: Palaeos - Geological Time Units. Apr 02, 2008
Added new Web site: Watersheds.org - Geologic Time Scale. Apr 02, 2008
Added new Web site: Earth Science Australia - Geological Time periods. Apr 02, 2008
Added new Web site: RocksandMineral.com - Geologic Time Chart. Apr 02, 2008
Added new Web site: Window To The Universe - Geologic Time Scale. Apr 02, 2008
Added new Web site: National Park Service - Geological Time. Apr 02, 2008
Added new Web site: National Park Service - Geologic Time. Apr 02, 2008
Article added to new online database. Jul 20, 1998
View Changes:
Article History
Revised:
By: