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New Data on Chronology of Landscape-Paleoclimatic Stages in Northwestern Russia During the Late Glacial and Holocene

Published online by Cambridge University Press:  18 July 2016

Kh A Arslanov ,
L A Savelieva ,
V A Klimanov ,
S B Chernov ,
F E Maksimov ,
T V Tertychnaya  and
D A Subetto
Kh A Arslanov*
Affiliation:
Geographical Research Institute, St. Petersburg State University, Sredny pr., 41, St. Petersburg 199004, Russia Institute of Geography, Russian Academy of Sciences, Staromonetny Lane, 29, Moscow 109017, Russia
L A Savelieva
Affiliation:
Institute of Geography, Russian Academy of Sciences, Staromonetny Lane, 29, Moscow 109017, Russia
V A Klimanov
Affiliation:
Institute of Limnology, Russian Academy of Sciences, Sevostianov's Str., 9, St. Petersburg 196105, Russia
S B Chernov
Affiliation:
Institute of Geography, Russian Academy of Sciences, Staromonetny Lane, 29, Moscow 109017, Russia
F E Maksimov
Affiliation:
Institute of Geography, Russian Academy of Sciences, Staromonetny Lane, 29, Moscow 109017, Russia
T V Tertychnaya
Affiliation:
Institute of Geography, Russian Academy of Sciences, Staromonetny Lane, 29, Moscow 109017, Russia
D A Subetto
Affiliation:
Institute of Limnology, Russian Academy of Sciences, Sevostianov's Str., 9, St. Petersburg 196105, Russia
*
Corresponding author. Email: ArslanovKh@mail.ru.
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Abstract

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Two lake and bog sediments have been thoroughly studied using palynological and radiocarbon dating methods. These are the Lembolovskoye Lake section located in the southern part of the Karelian Ithmus and the Mshinskoye bog section located in the southwestern part of the Leningrad province. The data obtained allow us to reconstruct the main features of the vegetation cover evolution, the chronology for the appearance and a real distribution of the main arboreal species from the south of the Leningrad province to the north, and to construct curves of the paleoclimate parameter changes for the area under study. Thirty-six 14C dates were obtained for the Lembolovskoye Lake section (7 m thick). According to those dates, the organic gyttja formation in the lake began 9870 ± 170 BP. Spore-pollen spectra with high percentage of herbs, arborescent, and shrub-birch dated back to the Younger Dryas were found out in clay layers at a depth of 6.5 m. An appearance of spruce and alder pollen is dated at 6860 ± 120 and 7510 ± 150 BP, respectively. The maximal percentage of broad-leaved species falls on the first half of the Atlantic (AT-1). Thirty-two dates were obtained for the Mshinskoye bog section (6 m thick): from 60 : 70 to 9520 ± 170 BP (the last date fixed the beginning of peat formation); 12 palinozones from the Preboreal to the Subatantic were recognized there. The spruce and alder pollen began to appear 7520 ±110 and 7670 ± 130 BP, respectively. The maximal amount of broad-leaved species is observed at 4690 ± 80 BP. The detailed reconstruction of changes in vegetation communities during the Late Glacial and Holocene was correlated with paleoclimatic characteristics, which have been recontructed for the sections under study by using the information from a statistical method of spore-pollen data processing.

Type
I. Our ‘Dry’ Environment: Above Sea Level
Information
Radiocarbon , Volume 43 , Issue 2B: Proceedings of the 17th International Radiocarbon Conference (Part 2 of 3), Conference Editors: Israel Carmi, Elisabetta Boaretto , 2001 , pp. 581 - 594
Copyright
Copyright © 2001 by the Arizona Board of Regents on behalf of the University of Arizona 

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