Parnell, JohnMcMahon, SeanBoyce, Adrian2018-04-022018-04-022018-10Parnell, J, McMahon, S & Boyce, A 2018, 'Demonstrating deep biosphere activity in the geological record of lake sediments, on Earth and Mars', International Journal of Astrobiology, vol. 17, no. 4, pp. 380-385. https://doi.org/10.1017/S14735504170003371473-5504http://hdl.handle.net/2164/10280Acknowledgements. The sample of gypsum was kindly provided by John Marshall, University of Southampton. SM was funded by an STFC Aurora studentship (grant ST/1506102/1) and by the NASA Astrobiology Institute (NNA13AA90A Foundations of Complex Life). AJB is funded by NERC support of the Isotope Community Support Facility at SUERC.6187278engdeep biospheregale craterlake sedimentsMarsOrcadian BasinScotlandsulphur isotopesQE GeologyEcology, Evolution, Behavior and SystematicsPhysics and Astronomy (miscellaneous)Space and Planetary ScienceEarth and Planetary Sciences (miscellaneous)STFC - Science and Technology Facilities CouncilST/1506102/1Natural Environment Research Council (NERC)QEJournal article10.1017/S1473550417000337http://www.scopus.com/inward/record.url?scp=85030832564&partnerID=8YFLogxK174