Alternate

The Geologic Time Scale had evolved greatly since its first use, and the scheme used here isn't identical to the one officially used by the International Commission on Stratigraphy. Thus, it is necessary for this site to provide alternate and historical timescales as well.

Alternate and Historical Timescales:

International Commission on Stratigraphy, 2012

International Commission on Stratigraphy, 2010

International Commission on Stratigraphy, 2009

International Commission on Stratigraphy, 2008