The laminated sediments at Pudozh in eastern Karelia are generally assumed to have been deposited between 13000 and 16000 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 Aller∅d, 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, three-less dwarf shrub heaths. Increased soil erosion may have occurred before 12 550 calendar years BP.
|Status||Udgivet - dec. 1999|
- Programområde 5: Natur og klima