Browsing Faculty of Arts and Sciences by Keyword "Earth history"

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    • 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 ...

    • Protistan Skeletons: A Geologic History of Evolution and Constraint 

      Knoll, Andrew Herbert; Kotrc, Benjamin (Springer Science + Business Media, 2015)
      The tests and scales formed by protists may be the epitome of lightweight bioconstructions in nature. Skeletal biomineralization is widespread among eukaryotes, but both predominant mineralogy and stratigraphic history ...