Title End moraine stratigraphy and formation in the southwestern Pyha-Luosto fell area, northern Finland
Author Sarala, P.; Johansson, P.; Valkama, J.
Author Affil Sarala, P., Geological Survey of Finland, Rovaniemi, Finland. Other: Institute of Geology and Geography, Lithuania
Source Quaternary International, 207(1-2), p.42-49, ; 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. 32 refs. GeoRef Acc. No: 307807
Index Terms glacial deposits; Pleistocene; Quaternary deposits; sedimentation; sediments; stratigraphy; Finland; Europe-- Lapland; Cenozoic; clastic sediments; depositional environment; end moraines; Europe; fluvial sedimentation; glacial environment; glacial sedimentation; glaciofluvial sedimentation; Lapland; moraines; northern Finland; Pyha-Luosto; Quaternary; Scandinavia; Scandinavian ice sheet; till; upper Pleistocene; upper Quaternary; upper Weichselian; Weichselian; Western Europe
Abstract The morphology, stratigraphy and composition of the small end moraine ridges were studied in the Pyha-Luosto fell area, northern Finland. The ridges occur in a restricted area and are formed of unique formations, in groups of ridges with intervals of tens of metres, with the chains of ridges being several kilometres in length. The ridges are composed of two to three till units of which the middle one exhibits shear, thrust and push structures, and sandy or gravelly layers and lenses. Massive boulder- rich flow till units and stratified sediments relating to ice-marginal deposition are also observed. Based on the stratigraphical studies, the formation of the end moraines is due to oscillation of the ice margin in the supra-aquatic environment during the retreat phase of the Late Weichselian Ice Age. The end moraine ridge observations in the Pyha- Luosto fell area are remarkable because these kinds of moraine deposits are rare in Finland, in the central part of the Last Scandinavian Ice Sheet.
URL http://hdl.handle.net/10.1016/j.quaint.2008.11.005
Publication Type conference paper or compendium article
Record ID 65004863