Holocene history on the northern part of the Kuršių Marios (Curonian) Lagoon Bottom deposits of the Vistula Lagoon of the Baltic Sea Possible evidence for the biogenic formation of sphaeroidal ferromanganese concretions from the Eastern Gulf of Finland, Baltic Sea Chubarenko, B., Lund-Hansen, L.C., Beloshitskii, A. Processing and mosaicking digital side scan sonar images from the western Baltic Sea Normalisation as a tool for environmental impact studies: the Gulf of Gdansk as a case study Main trends in accumulation of trace elements from surface sediments of the Baltic Sea (Lithuanian water area)