Abstract
Field lithostratigraphic studies, microfaunistic and palynological analyses, as well as optically stimulated luminescence (OSL) dating revealed for the first time that the lower part of Quaternary sediment sequences exposed along Zimnii Coast of the White Sea accumulated in marine and nearshore environments during the Boreal transgression at the beginning of the Last Interglacial and thus form the Upper Pleistocene Mikulinian Horizon. This is confirmed by lithology of sediment beds; species composition of foraminifers, ostracods and aquatic palynomorphs; and OSL dates in the range of 118–104 ka. The composition of benthic microfossils indicates that during the early Boreal transgression the entire Zimnii Coast was occupied by an coastal arctic ice-covered basin with water depths of 50 m, high sedimentation rates, and water stratification induced by melt/river water inflow. At the stage of regression, sedimentation in shallow marine environments was dominant along Zimnii Coast.
Published Version
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