Abstract
This paper presents results of diatom analyses of dated Upper-Pleistocene lacustrine deposits from the Shapkina river in the Bolshezemelskaja tundra of the USSR. Both diatom systematics and palaeoecology have been studied.
A marine diatom assemblage was found in the lower part of the sedimentary sequence and a rich freshwater assemblage, including more than 200 taxa, was found in the upper part. Some of the characteristic diatoms are typical of standing or slowly-moving waters of more southern and western districts but are not found in the Bolshezemelskaja tundra lakes today.
According to 14C dating, the age of the deposit is about 40 000 years, and represents the Middle-Valdaj (Middle-Weichselian). Palynological and diatom analysis suggest that the climate was similar to the present, that of an interglacial.
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References
Berdovskaja, G. N. & Loseva, E. I., 1975. Pleistocene lakes in the Shapkina river basin. The history of the lake in the Pleistocene: 114–119.
Loseva, E. I., 1978. The Middle-Valdaj sea-lake in the western part of Bolshezemelskaja tundra. Bull. Commission for Study of the Quaternary Period. 48: 103–112.
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Stenina, A. S., 1978. Diatoms. Flora and fauna of North-European lakes (Bolshezemelskaja tundra). Leningrad, Publishers‘Nauka’: 21–26; 117–136.
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© 1983 Dr. W. Junk Publisher, The Hague
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Loseva, E. (1983). The Middle-Valdaj Lakes in the Western part of the Bolshezemelskaja tundra. In: Meriläinen, J., Huttunen, P., Battarbee, R.W. (eds) Paleolimnology. Developments in Hydrobiology, vol 15. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7290-2_47
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DOI: https://doi.org/10.1007/978-94-009-7290-2_47
Publisher Name: Springer, Dordrecht
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