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Chronology of Vegetation and Paleoclimatic Stages of Northwestern Russia During the Late Glacial and Holocene

Published online by Cambridge University Press:  18 July 2016

Kh A Arslanov
Affiliation:
Geographical Research Institute, St Petersburg State University, Sredny pr., 41, St Petersburg 199004 Russia
L A Saveljeva
Affiliation:
Geographical Research Institute, St Petersburg State University, Sredny pr., 41, St Petersburg 199004 Russia
N A Gey
Affiliation:
Geographical Research Institute, St Petersburg State University, Sredny pr., 41, St Petersburg 199004 Russia
V A Klimanov
Affiliation:
Institute of Geography, Russian Academy of Sciences, Staromonetny Lane, 29, Moscow 109017 Russia
S B Chernov
Affiliation:
Geographical Research Institute, St Petersburg State University, Sredny pr., 41, St Petersburg 199004 Russia
G M Chernova
Affiliation:
Geographical and Geoecological Faculty, St Petersburg State University, 10th Line, 33, St Petersburg 199004 Russia
G F Kuzmin
Affiliation:
All-Russian Research Institute of Peat Industry, Marsovo Pole, 5, St Petersburg 191065 Russia
T V Tertychnaya
Affiliation:
Geographical Research Institute, St Petersburg State University, Sredny pr., 41, St Petersburg 199004 Russia
D A Subetto
Affiliation:
Institute of Limnology, Russian Academy of Sciences, Sevostianov's Str., 9, St Petersburg 196105 Russia
V P Denisenkov
Affiliation:
Geographical and Geoecological Faculty, St Petersburg State University, 10th Line, 33, St Petersburg 199004 Russia
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Abstract

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We have studied 6 reference sections of bog and lake sediments in the Leningrad and Novgorod provinces to develop a geochronological scale for vegetational and paleoclimatic changes in northwestern Russia during the Late Glacial and Holocene. Every 10-cm layer along the peat and gyttja sections (4–8.5 m thick) was investigated palynologically and the great majority of them were radiocarbon dated. Using the data obtained, standard palynological diagrams were plotted and vegetation history reconstructed. The palynozones indicated on the diagrams were related to the climatic periods and subperiods (phases) of the Blytt-Sernander scheme. On the basis of 230 14C dates obtained, we derived the geochronology of climatic periods and phases, as well as the chronology for the appearance and areal distribution of forest-forming tree species. The uppermost peat layers were dated by using the “bomb effect”. We compared the stages of Holocene vegetation and paleoclimatic changes discovered for the Leningrad and Novgorod provinces with the those obtained for Karelia, which we had studied earlier using the same methodology.

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Articles
Copyright
Copyright © The American Journal of Science 

References

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