News and Views
Nature Geoscience 2, 241 - 242 (2009)
doi:10.1038/ngeo484
Subject Category: Biogeochemistry
Biogeochemistry: Deepening the early oxygen debate
Kurt Konhauser1
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Kurt Konhauser is at the Department of Earth and Atmospheric Sciences University of Alberta, Edmonton, Alberta T6G 2E3, Canada.
e-mail: kurtk@ualberta.ca
Abstract
The timing of the earliest production of oxygen by photosynthesis is hotly debated. Haematite crystals from Pilbara, Australia, may provide evidence for a deep ocean that was at least occasionally oxygenated by photosynthetic microbes 3.46 billion years ago.
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