A Thumbnail Sketch of Earth History


The URL of this page is https://croninprojects.org/Vince/Course/PhysGeol/EarthHist.html

Originally after Emiliani, 1988
You are also encouraged to cruise the following web sites for some good information:


In the list that follows,
Ga is a unit symbol for "billion years" ,
Ma is the unit symbol for "million years", and
ka is the unit symbol for "thousand years"


Hadean, Gamowian & Planckian 13.8 to 4.5 Ga

Precambrian 4500 to 570 Ma
http://www.pbs.org/wgbh/evolution/change/deeptime/precam.html

Paleozoic 543 to 245 Ma

Mesozoic 248 to 65 Ma

Cenozoic 65 Ma to Present

Quaternary 1.8 Ma to Present

This Web document and the original material contained in it are copyright (© 2002-2021) by Vince Cronin, and may be used with attribution for non-profit educational and research purposes.