Aarno T. Kotilainen¹, Anu Kaskela¹, Susanna Kihlman¹, Mia M. Kotilainen², Matthias Moros³ and Meri Sahiluoto¹, (1)Geological Survey of Finland, Environmental Solutions, Espoo, Finland, (2)University of Helsinki, Department of Geosciences and Geography, Helsinki, Finland, (3)Leibniz Institute for Baltic Sea Research Warnemuende (IOW), Rostock, Germany