Abstract
The main objective of this study was to reconstruct and analyze changes in the natural and climatic conditions in the Karelian Isthmus over the Holocene. Bottom sediment samples from Lake Medvedevskoye were taken in the spring 2012. The sediments were AMS dated, and the datings were found to embrace the Late Glacial period and the entire Holocene. The integrated treatment of the bottom sediments included lithological, LOI and chironomid analyses. Based on the results of chironomid analysis, four stratigraphic zones were distinguished, and the natural environments corresponding to these zones were reconstructed.
Highlights
Bottom sediment samples from Lake Medvedevskoye were taken in the spring 2012
Based on the results of chironomid analysis, four stratigraphic zones were distinguished, and the natural environments corresponding to these zones were reconstructed
Медведевского, период седиментации которых охватывает позднеледниковье и весь голоцен, с применением первой в России статистической температурной хирономидной модели и литологического анализа позволили получить качественную реконструкцию климатических условий голоцена Карельского перешейка, что дало новую информацию о развитии палеоэкологических условий данного региона
Summary
Темно-серая плотная алевритовая глина с примесью песка. Благодаря своему высотному положению и малой площади водосборного бассейна оно, во-первых, не заливалось водами крупных приледниковых водоемов после дегляциации Карельского перешейка и, во-вторых, характеризуется непрерывным осадконакоплением и преобладанием в осадках автохтонной и эоловой составляющих [Субетто, 2009]
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