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Changes in the International Stratigraphic Chart

 
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Bjarne Rafaelsen
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Joined: 14 Mar 2004
Posts: 325
Location: Harstad

PostPosted: 03 Sep 2004 09:04    Post subject: Changes in the International Stratigraphic Chart Reply with quote

In the International Stratigraphic Chart of 2004 several changes are observed:

-Permian no longer consist of Upper and Lower Permian, but of Lower, Middle and Upper Permian.
-Some of the ages have changed (the Permian-Triassic boundary is now at 251 million years).
-The Quaternary period no longer exist.

Can you find other changes? What do you think of the changes?


The International Stratigraphic Chart 2004 http://www.stratigraphy.org
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