Late weichselian and early holocene shore displacement in the central Baltic sea

摘要: Abstract The glacial unloading and resulting isostatic land uplift have together with hydro-isostasy, eustatic rise of sea-level geoidal changes, ruled the shore displacement Fennoscandia. Within Baltic basin, periods damming shifts outlet further complicated during period studied, ca. 12.2-8.4 ka BP. Information on history was derived from shoreline observations studies sediment cores lakes formerly directly affected by Baltic. These were analyzed respect to pollen, diatoms, lithology determine sequences sediments, dated a combination radiocarbon dates biostratigraphy. studied areas southeastern Sweden, mainly central Gotland Oskarshamn area, eastern Smaland, display similar course displacement. Late Weichselian shows regression slightly decreasing rate between 12.2 10.3 Then followed fast drop (25 m) Baltic's water level; final drainage Ice Lake. During next 700 years, Yoldia stage, 17 m occurred. This is characterized freshwater diatoms in Baltic, but at 10 BP there evidence shortlasting (100–150 year) brackish water. Ancylus transgression, 11 m, began 9.6 culminated 9.3 It 8–10 thereafter decreased. Shoreline gradients showed that fastest tilting occurred around BP, thus 2 after deglaciation.