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. 2015 Jan 9;9(7):1648–1661. doi: 10.1038/ismej.2014.254

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Copyright © 2015 International Society for Microbial Ecology

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/

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Lake Cisó and basin C-III of Lake Banyoles as modern analogs of anoxic conditions prevailing in the ancient ocean. The illustration shows the geochemical distributions of Fe, S, C and O₂ in depth profiles and along different oceanic regimes (shelf, slope, open ocean) during Proterozoic (Lyons et al., 2014). Lake Cisó would be closer to coastal and continental shelf areas, whereas Banyoles C-III would be a more open ocean analogue.