Lithology and micro-paleontology of small lake bottom sediments of the Oleniy island in Kandalaksha bay of the White Sea

Lithological and micropaleontological (diatom and palinological analyses) study, radiocarbon dating of the stratified bottom sediments forming facially heterogeneous sedimentary sequences in a small lake isolated basin located within the limits of Kolvitsa Graben on the Oleniy Island in Kandalaksha Bay of the White Sea were carried out. We established that the stratigraphy of the facies of heterogeneous strata in the studied basin had been determined by the Late Holocene regression of the sea. Radiocarbon dating of facial transitions allowed identifying the time of isolation of the lake depression from the sea. We found out that the rate of earth’s surface elevation in the study area? associated with the Oleniy Island, had been larger than in other Kandalaksha Bay coastal areas with similar altitudes. These differences were caused by the differentiated neotectonic movements of the morphotectonic blocks.