Title When and how did the continental ice retreat from Estonia?
Author Raukas, A.
Author Affil Raukas, A., Tallinn University of Technology, Institute of Geology, Tallinn, Estonia. Other: Institute of Geology and Geography, Lithuania
Source Quaternary International, 207(1-2), p.50-57, ; Pleistocene and Holocene palaeoenvironments and recent processes across NE Europe, Plateliai, Lithuania, May 27- June 2, 2007, edited by J. Satkunas and M. Stancikaite. Publisher: Elsevier, Oxford, United Kingdom. ISSN: 1040- 6182
Publication Date Oct. 1, 2009
Notes In English. 51 refs. GeoRef Acc. No: 307806
Index Terms radioactive age determination; carbon isotopes; geochronology; glacial geology; ice sheets; isotopes; metals; pollen; radioactive isotopes; sedimentation; Estonia; absolute age; alkaline earth metals; Baltic region; Be- 10; beryllium; C-14; carbon; deglaciation; eskers; Europe; exposure age; fluvial features; fluvial sedimentation; glacial extent; glacial features; glacial sedimentation; glaciofluvial sedimentation; ice-marginal features; microfossils; miospores; optically stimulated luminescence; paleoenvironment; palynomorphs; planar bedding structures; sedimentary structures; varves
Abstract The territory of Estonia was freed from the continental ice in Gotiglacial time, which was characterized by high activity of the glacial streams and lobes and a highly variable glacial morphogenesis. Glaciers left behind different landforms and deposits, up to 200 m thick. Glacial accumulation was concentrated in the interlobate subglacial uplands. During the course of the thinning of the ice sheet, the movement and dynamics of its individual lobes was controlled by the underlying subglacial topography. The deglaciation history has been dated using 14C, varve chronology, palynology, electron spin resonance (ESR), thermoluminescence (TL), optically stimulated luminescence and the 10Be methods. The majority of the radiocarbon dates obtained from submorainic and intermorainic sequences are younger than would be expected. The obtained OSL and cosmogenic beryllium dates are extremely heterogenous, and cannot be readily used to improve the existing stratigraphical charts for the late-glacial period. In varve years Estonia became ice free at about 14 000-12 600 years ago.
URL http://hdl.handle.net/10.1016/j.quaint.2008.11.010
Publication Type conference paper or compendium article
Record ID 65004864