International Chronostratigraphic Chart with Notations used on Geological Maps-PDF
This original English version of the International Chronostratigraphic Chart with Notations (2022), incorporates alphanumeric notations for eons, eras, systems, series and stages.
The charters and more detailed information on GSSPs are available on the website of the International Commission on Stratigraphy (ICS) http://www.stratigraphy.org.
The official CMYK and RGB colour codes of the Stratigraphic Chart are available here: https://ccgm.org/produit/colour-code-according-to-the-commission-for-the-geological-map-of-the-world-cgmw/