Abstract
Comprehensive analysis of Holocene lacustrine-alluvial and boggy sediments has been carried out for the western shore of Umbozero Lake. Fouling and paludification of near-shore shoals of the lake, as well as peat deposits formation on the first lake terrace and in paleodeltas were found to be typical of the end of Atlantic and the beginning of the Subborreal Period of Holocene. Variations in the peat accumulation rate during the Subboreal and Subatlantic periods (for the last 4500 years) have been analyzed. Such variations can reflect both annual fluctuations in the amount of precipitation and changes in the groundwater table, which is related to the Umbozero water level in the region.
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