Abstract
Abstract. Lake Onego is a very important source of fresh water and traffic artery of Russian NW. In addition, it is a very significant source of paleogeographical and Quaternary geological information. Studies of geology, geomorphology, paleolimnology and ecology of Onego and Ladoga lakes are being conducted since 19th century by different institutes and research companies. At the modern stage of limnological research the most significant research centers are: Saint-Petersburg state university, Moscow state university, Limnological institute RAS, Northern Water problem institute RAS, PMGRE, VSEGEI, VNII Ocengeologia, and a lot of organizations with geology, ecology, limnology and hydrology specializations with Russian and foreign researchers. This article was written based on the results of field works conducted in 2014 - 2020. The article aimed to update the stratigraphy of Quaternary deposits of the Lake Onego bottom; describe bottom sediments and relief of Lake Onego; highlight stages of the Lake Onego bottom development according to geological and geomorphological features; compare Onego and Ladoga lakes bottom sediments and relief.
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