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Showing 1–6 of 6 results
Advanced filters: Author: Frantz Ossa Ossa Clear advanced filters

  • Phosphorus locked in ancient marine carbonates shows that ocean phosphorus rose and fell with atmospheric oxygen during the Great Oxidation Event, Earth’s first major oxygenation. Models suggest brief nutrient pulses could have accelerated oxygen production

    • Matthew S. Dodd
    • Chao Li
    • Andrey Bekker
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-12

  • Analysis of shallow-water marine carbonate samples from 101 stratigraphic units allows construction of a record of lithium isotopes from the past 3 billion years, tracking the evolution of the global carbon and silicon cycles.

    • Boriana Kalderon-Asael
    • Joachim A. R. Katchinoff
    • Philip A. E. Pogge von Strandmann
    Research
    Nature
    Volume: 595, P: 394-398

  • The evolution of oxygenic photosynthesis should have occurred some time before the oxidation of Earth’s atmosphere 2.5 billion years ago. The molybdenum isotopic signature of shallow marine rocks that formed at least 2.95 billion years ago is consistent with deposition in waters that were receiving oxygen from photosynthesis at least half a billion years before the oxidation of the atmosphere.

    • Noah J. Planavsky
    • Dan Asael
    • Olivier J. Rouxel
    Research
    Nature Geoscience
    Volume: 7, P: 283-286

  • Evidence for multicellular life before 1.6–1.0 billion years ago is scarce and controversial. Here the authors report organized, macroscopic structures from Gabon that date to 2.1 billion years ago, have a consistent structure and seem to show evidence of multicellular colonial organization. Coming not long after the rise in atmospheric oxygen concentration, these fossils might be considered harbingers of the multicellular life that drastically expanded about a billion years later.

    • Abderrazak El Albani
    • Stefan Bengtson
    • Alain Meunier
    Research
    Nature
    Volume: 466, P: 100-104

  • Approximately two billion years ago, during the Lomagundi Event, the oxygen conditions in the oceans allowed the oxidation and quantitative removal of iron at depth or near hydrothermal sources, according to bulk-rock and in-situ geochemical and isotopic data from pyrite from diverse sedimentary rocks of the Francevillian Group.

    • Abdulwaris Akanbi Ajagunjeun
    • Frantz Ossa Ossa
    • Ronny Schoenberg
    ResearchOpen Access
    Communications Earth & Environment
    Volume: 6, P: 1-11