Results of Optically Stimulated Luminescence Dating of Holocene Shoreline Formations of Lake Ladoga

This work is based on the research materials of shoreline landforms of Lake Ladoga. Determining their age, combined with leveling data, allows for a detailed history of water level changes in the Holocene. Two sites on the coast of Lake Ladoga were selected for the study: the Storozhensky Peninsula on the southern shore and the Taipalovsky Bay on the western shore. The accumulative terraces of the Storozhensky Peninsula are characterized by well-defined ancient beach ridges. The research conducted in this area allows for the precise determination of the timing of the Ladoga transgression’s culmination and the lake’s level during this period. In addition to the system of ridges, the coast of Taipalovsky Bay features a large barrier ridge up to 5 meters high. OSL dating indicates that this landform did not form during the last transgressive stage, as previously thought, but has an older, likely Littorina age. As a result, the obtained data allow for a comparison of lake level dynamics in different areas, thereby advancing towards determining the influence of tectonic movements.