Boreskov

PP‐31observed in the modern microbial mats from hypersaline environment of the LagoaVermelha in Brazil (Vasconcelos et al., 2006).Preliminary results demonstrate environmental similarities between modern microbialmats growing in hypersaline coastal lagoons and Paleoproterozoic stromatolites fromEastern Fennoscandian Shield.The study has been done in Geological Institute at the ETH‐Zentrum (Zürich, Switzerland)within the Framework of the ESF network Programm “Archean Environmental Studies: theHabitat of Early Life” during short visit grant (Ref. SV/3192).Prof. Dr. Judith Ann McKenzie and Dr. Crisogono Vasconcelos from GeomicrobiologyLaboratory for support and fruitful collaboration are grateful acknowledged.References[1]. Melezhik V.A., Fallick A.E., Medvedev P.V., Makarikhin V.V. (1999) Extreme 13 C carb enrichment in ca. 2.0 Gamagnesite‐stromatolite‐dolomite‐"red beds" association in a global context: a case for the world‐widesignal enhanced by a local environment. Earth‐Science Reviews, 48, p. 71‐120.[2]. Spadafora A., Perri E., McKenzie J. A. and Vasconcelos C. (2010) Microbial biomineralization processesforming modern Ca:Mg carbonate stromatolites. Sedimentology 57, 27–40.[3]. Vasconcelos, C., Warthmann, R., McKenzie, J.A., Visscher, P.T., Bittermann, A.G. and van Lith, Y. (2006)Lithifying microbial mats in Lagoa Vermelha, Brazil: modern Precambrian relics? Sed. Geol., 185, 175–183.189