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Item Dubiofossils from a Mars-analogue subsurface palaeoenvironment : the limits of biogenicity criteria(2021-09-01) McMahon, Sean; Ivarsson, Magnus; Wacey, David; Saunders, Martin; Muirhead, David; Belivanova, Veneta; Knoll, Pamela; Steinbock, Oliver; Frost, Daniel A.; University of Aberdeen.Geology and GeophysicsItem Sample Collection and Return from Mars : Optimising Sample Collection Based on the Microbial Ecology of Terrestrial Volcanic Environments(2019-10-09) Cockell, Charles S.; McMahon, Sean; Lim, Darlene S. S.; Rummel, John; Stevens, Adam; Hughes, Scott S.; Kobs Nawotniak, Shannon E.; Brady, Allyson L.; Marteinsson, Viggo; Martin-Torres, Javier; Zorzano, Maria-Paz; Harrison, Jesse; University of Aberdeen.Geology and GeophysicsItem Petrological evidence supports the death mask model for the preservation of Ediacaran soft-bodied organisms in South Australia(2019) Liu, Alexander G.; McMahon, Sean; Matthews, Jack J.; Still, John W.; Brasier, Alexander T.; University of Aberdeen.Geology and GeophysicsItem Petrological evidence supports the death mask model for the preservation of Ediacaran soft-bodied organisms in South Australia(2019-01) Liu, Alexander G.; McMahon, Sean; Matthews, Jack J.; Still, John W.; Brasier, Alexander T.; University of Aberdeen.Geology and GeophysicsItem The deep history of Earth's biomass(2018) McMahon, Sean; Parnell, John; University of Aberdeen.Geology and Geophysics; University of Aberdeen.Environment and Food Security; University of Aberdeen.EnergyItem Reduction spheroids preserve a uranium isotope record of the ancient deep continental biosphere(2018-10-29) McMahon, Sean; Hood, Ashleigh v. S.; Parnell, John; Bowden, Stephen; University of Aberdeen.Geology and Geophysics; University of Aberdeen.Environment and Food Security; University of Aberdeen.Energy; University of Aberdeen.Centre for Energy TransitionItem Demonstrating deep biosphere activity in the geological record of lake sediments, on Earth and Mars(2018-10) Parnell, John; McMahon, Sean; Boyce, Adrian; University of Aberdeen.Environment and Food Security; University of Aberdeen.Energy; University of Aberdeen.Geology and GeophysicsItem Evidence for Seismogenic Hydrogen Gas, a Potential Microbial Energy Source on Earth and Mars(2016-09-01) McMahon, Sean; Parnell, John; Blamey, Nigel J F; University of Aberdeen.Geology and Geophysics; University of Aberdeen.Environment and Food Security; University of Aberdeen.EnergyItem Evidence for methane in martian meteorites(2015-06-16) Blamey, Nigel J. F.; Parnell, John; McMahon, Sean; Mark, Darren F.; Tomkinson, Tim; Martin, Lee; Shivak, Jared; Izawa, Matthew R. M.; Banerjee, Neil R.; Fleming, Roberta L.; University of Aberdeen.Geology and Geophysics; University of Aberdeen.Environment and Food Security; University of Aberdeen.EnergyItem Detection of reduced carbon in a basalt analogue for martian nakhlite : a signpost to habitat on Mars(2014-04) Parnell, John; McMahon, Sean; Blamey, Nigel J F; Hutchinson, Ian B; Harris, Liam V; Ingley, Richard; Edwards, Howell G M; Lynch, Edward; Feely, Martin; University of Aberdeen.Geology and Geophysics; University of Aberdeen.Environment and Food Security; University of Aberdeen.Energy