Oxytropidoceras Posted July 24, 2018 Share Posted July 24, 2018 Evidence of a Limited Biosphere 1.4 Billion Years Ago Louisiana State University and McGill University https://www.mcgill.ca/newsroom/channels/news/billion-year-old-lake-deposit-yields-clues-earths-ancient-biosphere-288081 https://www.lsu.edu/mediacenter/news/2018/07/23gg_hayles_bao_nature.php The paper is: Crockford, P.W., Hayles, J.A., Bao, H., Planavsky, N.J., Bekker, A., Fralick, P.W., Halverson, G.P., Bui, T.H., Peng, Y. and Wing, B.A., 2018. Triple oxygen isotope evidence for limited mid-Proterozoic primary productivity. Nature, Letter | Published: 18 July 2018 https://www.nature.com/articles/s41586-018-0349-y Yours, Paul H. 1 Link to comment Share on other sites More sharing options...
Trevor Posted July 24, 2018 Share Posted July 24, 2018 Thank you for posting this. : ) Link to comment Share on other sites More sharing options...
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