New ICS International Chronostratigraphy Chart Uses the Long Norian

The base of the Norian stage is set at ~228 Ma on the new chronstratigraphy chart of the International Commission on Stratigraphy.  Still needs further support and eventially a golden spike, but this is the first time the ICS has used the long Norian hypothesis on its published chart.

You can download the latest timescale from here:

1 comment:

  1. Clicking on the above link, or first copying then pasting, brings a site in Japanese (?) which translated into English states that there is an error. Sincerely, Howard McPherson


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