SETI bioastro: How oxygen built up on Earth 2 billion years ago

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From: Larry Klaes (larry.klaes@incent.com)
Date: Wed May 02 2001 - 10:39:18 PDT


Two billion year old carbon signature of Wyoming rocks helps to reveal
shape of ancient ocean in middle America

Discoveries by a Virginia Tech doctoral student have provided missing
information about how oxygen was able to build up in Earth's atmosphere
two billion years ago, and is helping to trace the history of the ocean
between Wyoming and Minnesota.

http://www.spaceref.com/news/viewpr.html?pid=4704


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