Its primary objective is to precisely define global units (systems, series, and stages) of the International Chronostratigraphic Chart that, in turn, are the basis for the units (periods, epochs, and age) of the International Geologic Time Scale; thus setting global standards for the fundamental scale for expressing the history of the Earth.

IUGS ratified ICS Recommendation on redefinition of Pleistocene and formal definition of base of Quaternary   2009-07-23

[On June 30, 2009, IUGS ratified ICS Recommendation on redefinition of Pleistocene and formal definition of base of Quaternary. The pdf-format letter from IUGS is attached here.]

GSSP proposal for base of Jurassic System and Hettangian Stage: Voting to be on 23 March 2009   2009-03-20

http://www.stratigraphy.org/forum/viewtopic.php?f=6&t=22

Redefinition of Quaternary, Pleistocene, Neogene, and Pliocene under discussion by full commission of ICS; voting underway   2009-03-09

http://www.stratigraphy.org/forum/viewtopic.php?f=6&t=21

May of 2010: ICS Workshop in Prague   2009-07-23

Prague 2010 - ICS Workshop

Sep. of 2010: New Developments on Triassic Integrated Stratigraphy held in Italy   2010-03-04

Sep. of 2010: 7th International Triassic Field Workshop held in Italy   2010-03-04

7th International Triassic Field Workshop

Discussion on Triassic/Jurassic boundary   2010-04-07

Six files totally. Download here.

Discussions on boundaries of Quaternary, Pleistocene, Neogene and Pliocene   2010-04-07

Forty-two files totally. Download here.

International Stratigraphic Chart 2009   2009-08-31

Redefinition of Quaternary, Pleistocene, Neogene, and Pliocene under discussion by full commission of ICS; voting to take place soon   2009-03-17

Please visit the following address to view all contributions to discussion.