AMS 14C measurements and macrofossil analyses of a varved sequence near Pudozh, eastern Karelia, NW Russia |
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| Authors: | BARBARA WOHLFARTH OLE BENNIKE LARS BRUNNBERG IGOR DEMEDOV GÖRAN POSSNERT SERGEI VYAHIREV |
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| Institution: | Barbara Wohlfarth, Department of Quaternary Geology, Lund University, Tornavägen 13, S-223 63 Lund, Sweden;Ole Bennike, Geological Survey of Denmark and Greenland, Thoravej 8, DK-2400 Copenhagen NV, Denmark;Lars Brunnberg, Department of Quaternary Research, Stockholm University, S-106 91 Stockholm, Sweden;GÖran Possnert, ÅngstrÖm Laboratory, Uppsala University, Box 533, S-75121 Uppsala, Sweden;Igor Demidov and Sergei Vyahirev, Institute of Geology, Russian Academy of Sciences, Pushkinskaya str. 11, RU-185610 Petrozavodsk, Russia |
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| Abstract: | The laminated sediments at Pudozh in eastern Karelia are generally assumed to have been deposited between 13 000 and 16 000 14C yr BP and have been used to date the recession of the active ice margin. However, 17 AMS 14C measurements performed on terrestrial plant macrofossils contained in these sediments show that deposition began during the late Allerφd, when the ice margin had already receded to the northern part of Lake Onega. Based on an age model, we assume that the 1933-year-long varved sequence covers the time period between c. 12 900 and 11 000 calendar years BP. During this period, which comprises the later part of the Late Weichselian and the early Holocene, the local vegetation consisted of open, tree-less dwarf shrub heaths. Increased soil erosion may have occurred before 12 550 calendar years BP. |
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