![]() The dominant mineral phases in the sediments were quartz, feldspars and amphiboles, while halite and gypsum were the only evaporites detected. Here, we investigated sediment samples of four lake environments aimed at getting a fundamental understanding of the native microbial communities and the mineralogical and (bio)chemical composition of the sediments they are associated with. The region has previously been described as an analog environment for early Mars due to its geological and geophysical similarities. ![]() Processes like evaporation, flooding, erosion, as well as inflow of saline, often acidic and ion-rich groundwater contribute to the (dynamic) nature of the lakes and the composition of the sediments. The Yilgarn Craton in Australia has a large number of naturally occurring shallow ephemeral lakes underlain by a dendritic system of paleodrainage channels. 7Centro de Química-Física Molecular-Institute of Nanoscience and Nanotechnology (CQFM-IN), Institute for Bioengineering and Biosciences (iBB), Departamento de Engenharia Química, Instituto Superior Técnico (IST), Universidade de Lisboa, Lisbon, Portugal.6Space Policy Institute, Elliott School of International Affairs, George Washington University, Washington, DC, United States.5Leiden Observatory, Leiden University, Leiden, Netherlands.4Department of Earth Science and Engineering, Faculty of Engineering, Imperial College London, London, United Kingdom.3Department of Applied Geology, Curtin University, Perth, WA, Australia. ![]()
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