NAI
Ian Johnson
Pennsylvania State University
Current Projects
- Biosignatures in Ancient Rocks - Kasting Group — 2013 NAI
- Biosignatures in Ancient Rocks — 2012 NAI
- Biosignatures in Ancient Rocks — 2011 NAI
- Biosignatures in Ancient Rocks — 2010 NAI
- Biosignatures in Ancient Rocks — 2009 NAI
- View all 6 projects
NAI Project Collaborators
- Project collaborators as reported by the latest NAI Annual Report.
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Publications
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Ohmoto, H., Watanabe, Y., Lasaga, A. C., Naraoka, H., Johnson, I., Brainard, J., & Chorney, A. (2014). Oxygen, iron, and sulfur geochemical cycles on early Earth: Paradigms and contradictions. Earth’s Early Atmosphere and Surface Environment, None, 55–95. doi:10.1130/2014.2504(09)
See Project - Johnson, I. (2009). The Earth’s oldest (~3.4 GA) paleosol at Trendall Ridge in the North Pole Dome region of the Eastern Pilbara Craton, Western Australia. Geosciences. University Park: The Pennsylvania State University. See Project See Project
- Johnson, I., Watanabe, Y., Stewart, B. & And Ohmoto, H. (2010). Evidence for terrestrial life and an O2-rich atmosphere in the oldest (~3.4 Ga) paleosol in the east Pilbara craton, Western Australia. 6th Astrobiology Sci. Conference. League City, TX. See Project
- Johnson, I., Watanabe, Y., Stewart, B. & Ohmoto, H. (2009). Earth’s oldest (~3.4 Ga) lateritic paleosol in he Pilbara Craton, Western Australia. Goldschmidt conference. Davos, Switzerland. See Project See Project
- Johnson, I., Watanabe, Y., Stewart, B. & Ohmoto, H. (2009). Earth’s oldest (~3.4 Ga) lateritic paleosol in the Pilbara craton, Western Australia. 19th Goldschmidt conference, Davos, Switzerland. Geochim. Cosmochim. Acta, 73(13S): A601. See Project
- Ohmoto, H., Bevacqua, D.C., Johnson, I. & Watanabe, Y. (2010). Geochemical cycles of Fe, Mo, U, Cu, Cr, REEs, and S during the period 3.5-3.2 Ga ago. Geochim. Cosmochim. Acta, 74(12S): A774. See Project
