The International Chronostratigraphic Chart has just been updated in October. In fact, it is in constant update, and during some years it gets two or three updates. It’s also translated from English into different languages, which is always nice. It’s produced by the International Commission on Stratigraphy.
The International Chronostratigraphic Chart sets the standard dates, names and colours (opens an Excel file) to use when we refer to geological time. Yes, in some countries geologists prefer to use local references, but I do like my Jurassic in blue and my Cretaceous in green.
You can find it as a pdf and as a jpg files.
(1): Cohen, K.M., Finney, S.C., Gibbard, P.L. & Fan, J.-X. (2013; updated)
The ICS International Chronostratigraphic Chart. Episodes 36: 199-204.
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