J. A. Baross, W. S. Wilcock, D. S. Kelley, E. F. Delong, and S. C. Cary, The subsurface biosphere at mid-ocean ridges: issues and challenges. The subseafloor biosphere at mid-ocean ridges, pp.1-11, 2004.

H. Furnes, Oceanic pillow lavas and hyaloclastites as habitats for microbial life through time-A review. Links between Geological Processes, Microbial Activities and Evolution of Life, pp.1-68, 2008.

E. Versh, K. Kirsimäe, and A. Jõeleht, Development of potential ecological niches in impact-induced hydrothermal systems: The small-to-medium size impacts, Planet. Space Sci, vol.54, pp.1567-1574, 2006.

G. R. Osinski, Impact-generated hydrothermal systems on Earth and Mars, Icarus, vol.224, pp.347-363, 2012.

J. P. Amend and A. Teske, Expanding frontiers in deep subsurface microbiology, Palaeogeogr. Palaeoclimatol. Palaeoecol, vol.219, pp.131-155, 2005.

E. Trimarco, D. Balkwill, M. Davidson, and T. C. Onstott, In situ enrichment of a diverse community of bacteria from 4-5 km deep fault zone in South Africa, Geomicrobiol. J, vol.23, pp.463-473, 2006.

B. Orcutt, J. B. Sylvan, N. J. Knab, and K. J. Edwards, Microbial ecology of the dark ocean above, at, and below the seafloor. Microbiol, Mol. Biol. Rev, vol.75, pp.361-422, 2011.

A. J?eleht, K. Kirsimäe, J. Plado, E. Versh, and B. Ivanov, Cooling of the Kärdla impact crater: II. Impact and geothermal modeling, Meteorit. Planet. Sci, vol.40, pp.21-33, 2005.

D. E. Ames, D. H. Watkinson, and R. R. Parrish, Dating of a regional hydrothermal system induced by the 1850 Ma Sudbury impact event, Geology, vol.26, pp.447-450, 1998.

M. V. Naumov, Impact-generated hydrothermal systems: data from Popigai, Kara, and Puchezh-Katunki impact structures. Impacts in Precambrian shields, pp.117-171, 2002.

T. Hode, S. Cady, I. Von-dalwigk, and P. Kristiansson, Evidence of ancient microbial life in an impact structure and its implications for astrobiology -a case study. From Fossils to Astrobiology, pp.249-273, 2008.

P. Lindgren, Putative fossil life in a hydrothermal system of the Dellen impact structure, Sweden. Int. J. Astrobiol, vol.9, pp.137-146, 2010.

J. Parnell, Sulfur isotope signatures for rapid colonization of an impact crater by thermophilic microbes, Geology, vol.38, pp.271-274, 2010.

J. A. Rathbun and S. W. Squyres, Hydrothermal systems associated with Martian impact craters, Icarus, vol.157, pp.362-372, 2002.

C. Alwmark and B. Schmitz, Extraterrestrial chromite in the resurge deposits of the early Late Ordovician Lockne crater, central Sweden, Earth Planet. Sci. Lett, vol.253, pp.291-303, 2007.

V. Shuvalov, J. Ormö, and M. Lindström, Hydrocode simulation of the Lockne marine target impact event. Impact Tectonics, pp.405-422, 2005.

K. Högdahl, 1.86-1.85 Ga intrusive ages of K-feldspar megacryst-bearing granites in the type area of the Revsund granites in Jämtland County, central Sweden, GFF, vol.122, pp.359-366, 2000.

M. Lindström, J. Lundqvist, and T. Lundqvist, Sveriges geologi från urtid till nutid, 2000.

E. F. Sturkell, C. Broman, P. Forsberg, and P. Torssander, Impact-related hydrothermal activity in the Lockne impact structure, Eur. J. Min, vol.10, pp.589-606, 1998.

S. R. Gainey and M. E. Elwood-madden, Kinetics of Methane Clathrate Formation and Dissociation Under Mars Relevant Conditions, Icarus, vol.218, pp.513-524, 2012.

A. Lahfid, Evolution of the Raman spectrum of carbonaceous material in low-grade metasediments of the Glarus Alps (Switzerland). T, pp.354-360, 2010.

Z. Sharp, Principles of stable isotope geochemistry. (Pearson Education, 2007.

T. Stephan, E. K. Jessberger, C. H. Heiss, and D. Rost, TOF-SIMS analysis of polycyclic aromatic hydrocarbons in Allan Hills 84001, Meteor. Planet. Sci, vol.38, pp.109-116, 2003.

S. Siljeström, Detection of organic biomarkers in crude oils using ToF-SIMS, Org. Geochem, vol.40, pp.135-143, 2009.

V. Thiel and P. Sjövall, Using Time-of-Flight Secondary Ion Mass Spectrometry to Study Biomarkers, Annual Review of Earth and Planetary Sciences, 2010.

S. Siljeström, Single fluid inclusion analysis using ToF-SIMS: Implications for ancient Earth biodiversiy and paleoenvironment studies PhD thesis, 2011.

M. Ivarsson, Advantages of doubly polished thin sections for the study of microfossils in volcanic rock, Geochem. Transact, vol.7, issue.5, 2006.

K. Kashefi and D. R. Lovley, Extending the upper temperature limit for life, Science, vol.301, p.934, 2003.

H. L. Ehrlich and . Geomicrobiology, , 1996.

J. L. Franzen, Exceptional preservation of Eocene vertebrates in the lake deposit of Grube Messel (West Germany), Phil. Trans. R. Soc. Lond, vol.311, pp.181-186, 1985.

C. A. Shaw, Rancho La Brea, Death Trap and Treasure Trove, Terra, vol.38, p.51, 2001.

M. V. Naumov, Principal features of impact-generated hydrothermal circulation systems: mineralogical and geochemical evidence, Geofluids, vol.5, pp.165-184, 2005.

B. A. Hofmann, J. D. Farmer, F. Blanckenburg, and A. E. Fallick, Subsurface filamentous fabrics: an evaluation of origins based on morphological and geochemical criteria, with implications for exopaleontology, Astrobiology, vol.8, pp.87-117, 2008.

M. Ivarsson, S. Bengtson, H. Skogby, V. Belivanova, and F. Marone, Fungal colonies in open fractures of subseafloor basalt, Geo-Mar. Lett, vol.33, pp.233-243, 2013.

J. W. Deacon, Modern mycology, 1997.

J. Webster and R. W. Weber, Introduction to fungi, 2007.

Y. Nagano and T. Nagahama, Fungal diversity in deep-sea extreme environments, Fung. Ecol, vol.5, pp.463-471, 2012.

C. Broman, E. Sturkell, and A. E. Fallick, Oxygen isotopes and implications for the cavity-grown quartz crystals in the Lockne impact structure, Sweden. GFF, vol.133, pp.101-107, 2011.