Browsing FAS Scholarly Articles by Keyword "Ediacaran"

Now showing items 1-8 of 8

    • The Ecological Physiology of Earth's Second Oxygen Revolution 

      Sperling, Erik; Knoll, Andrew Herbert; Girguis, Peter R. (Annual Reviews, 2015)
      Living animals display a variety of morphological, physiological, and biochemical characters that enable them to live in low-oxygen environments. These features and the organisms that have evolved them are distributed in ...

    • The Ediacaran Period: A New Addition to the Geologic Time Scale 

      Knoll, Andrew; Walter, Malcolm R.; Narbonne, Guy M.; Christie-Blick, Nicholas (Blackwell Publishing, 2006)
      The International Union of Geological Sciences has approved a new addition to the geologic time scale: the Ediacaran Period. The Ediacaran is the first Proterozoic period to be recognized on the basis of chronostratigraphic ...

    • Fungi evolved right on track 

      Lucking, R.; Huhndorf, S.; Pfister, Donald H.; Plata, E. R.; Lumbsch, H. T. (Mycological Society of America, 2009)
      Dating of fungal divergences with molecular clocks thus far has yielded highly inconsistent results. The origin of fungi was estimated at between 660 million and up to 2.15 billion y ago, and the divergence of the two major ...

    • Late Ediacaran Redox Stability and Metazoan Evolution 

      Knoll, Andrew Herbert; Johnston, David T; Poulton, S. W.; Goldberg, T.; Sergeev, V. N.; Podkovyrov, V.; Vorob’eva, N. G.; Bekker, A. (Elsevier, 2012)
      The Neoproterozoic arrival of animals fundamentally changed Earth's biological and geochemical trajectory. Since the early description of Ediacaran and Cambrian animal fossils, a vigorous debate has emerged about the drivers ...

    • Neoproterozoic Microfossils from the Margin of the East European Platform and the Search for a Biostratigraphic Model of Lower Ediacaran Rocks 

      Vorob’eva, Nataliya G.; Sergeev, Vladimir N.; Knoll, Andrew Herbert (Elsevier, 2009)
      A ca. 600 m thick siliciclastic succession in northern Russia contains abundant and diverse microfossils that document early to middle Ediacaran deposition along the northeastern margin of the East European Platform. The ...

    • Oxygen, Ecology, and the Cambrian Radiation of Animals 

      Sperling, Erik A.; Frieder, Christina A.; Raman, Akkur V.; Girguis, Peter R.; Levin, Lisa A.; Knoll, Andrew Herbert (Proceedings of the National Academy of Sciences, 2013)
      The Proterozoic-Cambrian transition records the appearance of essentially all animal body plans (phyla), yet to date no single hypothesis adequately explains both the timing of the event and the evident increase in diversity ...

    • Searching for an oxygenation event in the fossiliferous Ediacaran of northwestern Canada 

      Johnston, David T; Poulton, S.W.; Tosca, N.J.; O'Brien, T.; Halverson, G.P.; Schrag, Daniel P.; Macdonald, Francis Alexander (Elsevier BV, 2013)
      Late Neoproterozoic (Ediacaran) strata from northwestern Canada provide a thick and rich sedimentological record, preserving intercalated carbonates and shale extending from the ~ 635 million year old Marinoan glacial ...

    • The Stratigraphic Relationship Between the Shuram Carbon Isotope Excursion, the Oxygenation of Neoproterozoic Oceans, and the First Appearance of the Ediacara Biota and Bilaterian Trace Fossils in Northwestern Canada 

      Macdonald, Francis Alexander; Strauss, Justin Vincent; Sperling, Erik A.; Halverson, Galen P.; Narbonne, Guy M.; Johnston, David T; Kunzmann, Marcus; Schrag, Daniel P.; Higgins, John A. (Elsevier BV, 2013)
      A mechanistic understanding of relationships between global glaciation, a putative second rise in atmospheric oxygen, the Shuram carbon isotope excursion, and the appearance of Ediacaran-type fossil impressions and ...