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. ...
    • Uncovering the Neoproterozoic Carbon Cycle 

      Johnston, David T; Macdonald, Francis Alexander; Gill, B; Hoffman, Paul; Schrag, Daniel P. (Nature Publishing Group, 2012)
      Interpretations of major climatic and biological events in Earth history are, in large part, derived from the stable carbon isotope records of carbonate rocks and sedimentary organic matter1,2. Neoproterozoic carbonate ...