Early Holocene shore-displacement in southern central Sweden as recorded in elevated isolated basins

Sediment cores from seven basins in two regions, the Sodertorn peninsula an d central Narke in southern central Sweden, were subject to diatom analysis and radiocarbon dating of the isolation events. In the former area, the co mpiled shore-displacement curve covers the time period from the deglaciatio n to 5700 BP. The latter area is covered from 8200 to 6500 BP. The chronolo gy is based on combined macrofossil and bulk ages with an acknowledged corr ection. The most elevated sedimentary basin on the Sodertorn peninsula was isolated at the end of the brackish water phase of the Yoldia Sea. During t he Ancylus Lake stage of the Baltic, one minor ingression is recorded in th e same area. The end of the Ancylus Lake is dated to c. 8200 BP on the Sode rtorn peninsula and to c. 8100 BP in central Narke. There was an interval o f c. 1000 C-14 years when brackish water prevailed in central eastern Swede n. Mastogloia is a typical diatom genus for that period. The onset of the b rackish-marine Litorina Sea is dated to c. 7000 BP in central Narke. The am plitude far the early Litorina Sea transgression (L 1) did not exceed 2 m. L 1 is recorded 2-3 m higher in central Narke compared to the Sodertorn pen insula. i.e. the former area has experienced a more intense isostatic uplif t since 6500 BP.