We examine three questions concerning the post-glacial geological history of the eastern Gulf of Finland: (1) the amplitude of the Holocene sea-level regressions; (2) the time and mechanism of the development of large sand accretion forms (bars and spits), including dunes; and (3) the sea-level changes and coastal development over the last 4 kyr. Recent on-land geoarchaeological studies, as well as detailed marine geological research of the Gulf of Finland nearshore bottom, have provided new data for developing a hypothesis about the palaeogeographical development of the area. Geoarchaeological studies carried out around Sestroretsky Artificial Lake and within Okhta Cape, as well as analyses of previous studies of the Neolithic–Early Metal settlements, have shed new light on some aspects of coastal system development. Geographical information system (GIS)-based modelling of Holocene shorelines for the different time periods can be useful for future archaeological research. A series of submarine terraces was found at the bottom of the Gulf (sea depths from 10 to 2 m). The analysis of marine geological data (submarine terraces) and distribution of archaeological sites can be explained by a possible rise in relative sea level in the Gulf of Finland at 5 ka BP and a regression around 3 ka BP.

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ТАТЬЯНА МАТВЕЕВНА ГУСЕНЦОВА кандидат исторических наук, научный сотрудник АНО «Научно-исследовательский институт культурного и природного наследия» (Санкт-Петербург, Российская Федерация

In Southern Ladoga area, we studied the new archaeological site Podolje 1, located 4 km from Lake Ladoga. Studies included archaeological, lithological, geochemical, pollen, botanical, diatom and radiocarbon analyzes. As a result, new data were obtained that specified the development of the Ladoga transgression in the second half of the Holocene in the Southern Ladoga area. The dependence of the formation of cultural layers on changes in the hydrodynamic conditions of its existence is established. The lower cultural layer was formed before the beginning of the Ladoga transgression. The upper cultural layer was formed after the transgressive stage. At absolute elevations from 10 to 12 m above Sea level in the Southern Ladoga area from 6480 to 4446 cal. BP peatlands were formed. In this case, 64805944 cal. BP there was a period of some humid climate. 45344446 cal. BP, the beginning of the Ladoga transgression is recorded on the territory of the site. The completion of the Ladoga transgression was marked at the beginning of the Subatlantic period.