Late Wiechselian and Holocene sediments and their acoustic signatures in the northeastern part of the Gulf of Riga Mapping of Quaternary groundwater in Latvia - a review of different approaches Impact of near surface compaction on layer geometry within uncosolidated sediments, south western Baltic Sea Regularities of gully erosion network development and spatial distribution in southeastern Latvia Lateglacial environment inferred from palaeobotanical and 14C data of sediment sequence from Lake Kašučiai, West Lithuania Mesoproterozoic events in eastern and central Lithuania as recorded by 40Ar/39Ar ages