Vėlyvojo ledynmečio gamtinės aplinkos raida Lietuvoje

A detailed description of the Late Glacial environment was attempted through an interpretation of pollen data and lithologi-cal records in the sequences with 14C chronologies. Pollen data suggests that during the pre-Allerod time (>11.9I4C kyr. BP) tree-less vegetation flourished in the area where sedimentation in freshwater bodies with a high water level was dominant. The formation of Betu/a and Pimis predominating forest (11.9-11.8'4C kyr. BP) coincides with the increasing representation of the organic constituent in investigated sequences. Palaeobotanical records show some improvement of the climatic conditions since the middle of the Younger Dryas cold event (10.5-10.414C kyr. BP). Sedimentation in oligo-mesotrophic nutrient-rich lakes with a rather high water level was typical for the end of the Late Glacial