Affiliation: University of Washington
- When did oxygenic photosynthesis evolve?Roger Buick
Department of Earth and Space Science and Astrobiology Program, University of Washington, Seattle, WA 98195 1310, USA
Philos Trans R Soc Lond B Biol Sci 363:2731-43. 2008..Hence, the hypothesis that oxygenic photosynthesis evolved well before the atmosphere became permanently oxygenated seems well supported...
- Isotopic evidence for an aerobic nitrogen cycle in the latest ArcheanJessica Garvin
Department of Earth and Space Sciences and Astrobiology Program, University of Washington, Seattle, WA 98195 1310, USA
Science 323:1045-8. 2009..These data imply that nitrifying and denitrifying microbes had already evolved by the late Archean and were present before oxygen first began to accumulate in the atmosphere...
- Air density 2.7 billion years ago limited to less than twice modern levels by fossil raindrop imprintsSanjoy M Som
Department of Earth and Space Sciences and Astrobiology Program, University of Washington, Seattle, Washington 98195 1310, USA
Nature 484:359-62. 2012..The upper estimate for air density renders the pressure broadening explanation possible, but it is improbable under the likely lower estimates. Our results also disallow the extreme CO(2) levels required for hot Archaean climates...
- Abrupt and gradual extinction among Late Permian land vertebrates in the Karoo basin, South AfricaPeter D Ward
Department of Biology, University of Washington, Seattle, WA 98195, USA
Science 307:709-14. 2005....
- Late Archean biospheric oxygenation and atmospheric evolutionAlan J Kaufman
Departments of Geology and Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20742 4211, USA
Science 317:1900-3. 2007..The data suggest that oxygenation of the surface ocean preceded pervasive and persistent atmospheric oxygenation by 50 million years or more...
- A whiff of oxygen before the great oxidation event?Ariel D Anbar
School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, USA
Science 317:1903-6. 2007..These findings point to the presence of small amounts of O2 in the environment more than 50 million years before the start of the Great Oxidation Event...