Editorial Column. BALTICA approaches its 50 years anniversary Influence of chemical weapons and warfare agents on the metal contents in sediments in the Bornholm Basin, the Baltic Sea Mapping of sensitivity to oil spills in the Lithuanian Baltic Sea coast Reconstruction of Late Holocene development of the submarine terrace in the eastern Gulf of Finland Palaeo–Nemunas delta history during the Holocene Reconstruction of the land–sea changes on the Juminda Peninsula, North Estonia, during the last 10 000 years Seasonal and spatial variations of sedimentary matter and diatom transport in the Klaipėda Strait (Eastern Baltic) Trends in the frequency of extreme climate events in Latvia Main patterns of coastal zone development of the Curonian Spit, Lithuania Sand accumulation under varying lithohydrodynamic conditions in the coastal area of the north–eastern Baltic Sea The Baltic Sea Geology–10 Contribution of ,,BALTICA” to the studies of geology, geomorphology and palaeogeography of the Baltic Sea Abstracts