Cover of last glaciation deposits at the Eastern Barents Sea: originality of composition, thicknesses distribution, grandiosity and singularity of structure forms

Analysis of the data of seismoacoustic investigation and geotechnical drilling in the Eastern Barents Sea has shown the following. The Upper Weichselian glacial deposits cover spread regionally. It represents seismostratigraphic complex (SSC) SSC III, unconformity occurs on the Mezozoic deposits, partly - on the Lower Weichselian moraine (SSC V) and is overlain unconformity by the Late Glacial glaciomarine (SSC II) - Holocene marine (SSC I) sediments. SSC III consists of two seismofacies (SF). Predominant SSF III-C are formed by the ordinary moraine almost solely, and SF III-T - by the M-moraine. The presence of these moraines determines SSC III thicknesses distribution nearly completely. The ordinary moraine thickness fluctuates from < 10 m to 10-25 m. The M-moraine forms huge in plan, positive accumulation bodies in which its thickness > 25 m and arrives at 50-75 m. The Upper Weichselian deposit cover has also the other grandiosity structure-morphological elements: end moraines (the giant form was discovered) and powerful subglacial cuts, which represent unique unburied analog of the known so-called tunnel valleys. Structure, composition, thicknesses particularities of SSC III deposits cover are determinated by specific character of the development of the Last Glaciation in the region.