This paper deals with the issue of changing the conditions of the
geographical environment in the postglacial and Holocene in the central part
of the Karelian Isthmus. Toward paleogeographic reconstruction, a survey of
the sediments of the bottom of Lake Krasnoye (Leningrad Oblast, Russian
Federation) was conducted, since the lake deposits represent a reliable
source of information about natural events from the past. A large amount of
data obtained by X-ray fluorescence analysis of the core sample was
analyzed, a lithostratigraphic description of the sediments was carried out
and geophysical characteristics of the bottom sediments were interpreted.
They were divided into several units that differed in the number of
properties and reflected different sedimentation conditions. In the
reconstruction of the past natural environment, special attention is paid to
paleoclimatic and paleosedimentological issues.