The areal geological-geophysical study of Quaternary sediments was carried out in two areas of the eastern Barents Sea (Central Deep and Murmansk Bank). This communication is mainly dedicated to the results of seismoacoustic investigations. It has been established that the Quaternary sequence unconformably overlying the pre-Cenozoic strata in the studied areas is as follows (from bottom to top): marine-glaciomarine Late Glacial-Holocene sediments, massive diamictons (the main part of the section), and glaciotectonites formed after the underlying Mesozoic unconsolidated sediments. The Pleistocene diamictons, origin of which is still debatable, are the main studied object. They constitute two seismostratigraphic complexes (SSC). According to the accepted stratigraphic subdivision, they are represented by the Upper Weichselian SSC III (Maximum Last Glaciation) and Lower Weichselian SSC V (Middle Weichselian SSC IV is eroded here). Complexes SSC V and SSC III composed of till overlie the older sediments with the exaration unconformity. Complex SSC V is preserved locally, while SSC III is characterized by the regional distribution. Complex SSC III is universally enveloped unconformably without erosional surface by an acoustically uniform thin-bedded member of Late Glacial-Holocene glaciomarine and marine sediments (SSC II+I). Unlike SSC V, SSC III demonstrates lateral heterogeneity in both studied areas consisting of two seismofacies, one of which forms very specific acoustically transparent bodies (ATBs). Sediments of SSC III avoided subsequent erosion. Therefore, their glacial nature is distinctly reflected in the complex distribution of thickness and peculiar morphology of corresponding bodies.