Now showing items 1-2 of 2

    • Devonian Rise in Atmospheric Oxygen Correlated to the Radiations of Terrestrial Plants and Large Predatory Fish 

      Dahl, Tais; Hammarlund, Emma U.; Anbar, Ariel D.; Bond, David P. G.; Gill, Benjamin; Gordon, Gwyneth W.; Knoll, Andrew Herbert; Nielsen, Arne T.; Schovsbo, Niels H.; Canfield, Donald E. (National Academy of Sciences, 2010)
      The evolution of Earth’s biota is intimately linked to the oxygenation of the oceans and atmosphere. We use the isotopic composition and concentration of molybdenum (Mo) in sedimentary rocks to explore this relationship. ...
    • Molybdenum evidence for expansive sulfidic water masses in ~750Ma oceans 

      Dahl, Tais; Canfield, Donald E.; Rosing, Minik T.; Frei, Robert E.; Gordon, Gwyneth W.; Knoll, Andrew Herbert; Anbar, Ariel D. (Elsevier BV, 2011)
      The Ediacaran appearance of large animals, including motile bilaterians, is commonly hypothesized to reflect a physiologically enabling increase in atmospheric and oceanic oxygen abundances (pO2). To date, direct evidence ...