Features of the Late Pleistocene-Holocene morphogenesis of the Lake Ladoga basin

This study presents the results of examining the geomorphological structure of the bottom of Lake Ladoga. The research materials were obtained through the interpretation of a complex seismoacoustic data collected over the past 30–40 years. A pronounced geomorphological zonation along the axis of the water body has been established. The relief of the northern deep-water part of the basin is represented by constructural-denudative and lake nepheloid genetic types. The central part of the lake is characterized by glacial and glaciofluvial reliefs formed during the Neva marginal stage of the Ostashkov glaciation deglaciation. The southern shallow waters are composed of accumulative glacial-lacustrine and abrasional lacustrine plains. Here, paleo-shorelines features, indicating a lower water level than the present, are most prominently expressed. Fluvial and fluvio-nepheloid relief types are distinguished separately, with their forms azonally located on the bottom surface. The obtained data allow for detailed paleogeographic reconstructions of the Lake Ladoga development during the Late and Post-glacial.