Geologic Timescale


Earth’s Entire History (Visualized On A Football Field)

Geologic Time Scale by Mr. Parr (music- Can’t Stop the Feeling by Justin Timberlake)

How Common are Mass Extinctions – TED Ed

Note Taking Guide: If your teacher has not already shared this document with you, please make a copy, rename the document, and save into your Science 8 folder.


Subscription Databases:

Britannica School Online encyclopedia – you should search both the middle and high versions, if you are having trouble finding your time segment (ex. Tertiary Period is in the high version and not the middle).

Gale Science

Gale Student Resources – includes articles on many of the time segments that are easier reading levels.


Useful Websites:

Geologic Timeline: Created at Lehigh University – contains information on paleoclimate, geography and CO2 levels.

National Park Service –  Fossils and Paleontology, Geologic Time, Geologic Time Scale

University of California Museum of Paleontology – Geologic Time Scale –  Select hyperlink for your segment for more details (not all time segments included).  Get additional citation information from the bottom of the main page.

Geological Time Machine – UC Berkeley Get additional citation information from the links at the bottom of the main page.




Karpelenia, Jenny. Geologic Time. Perfection Learning, 2005.




Nagel, Rob, and Diane Sawinski, editors. UXL Encyclopedia of Landforms and Other Geologic Features, UXL, 2004. 3 vols. Gale eBooks, Accessed 1 Mar. 2022.

Last update 3/10/22