Zasięg lądolodu Odry (Saalian) we wschodniej Polsce

Jan Buraczyński



The extent of the Odra icesheet in area between the Vistula and Bug Rivers in times of the maximum and other stadials is reconstructed on the basis of distribution of glacial sediments and their datings made by thermoluminescence method (Fig. 1). The reconstruction is also based on results of analysis of pre-Quaternary bedrock relief.
The beginning of the Odra Glaciation is delineated by sediments of the oldest Krzna stadial dated at about 310,000 years B.P. At that time the icesheet reached line passing from outlet of the Kamienna River to Włodawa upon the Vistula River. The icesheet attained the maximum extent in the maximum stadial, 300,000-280,000 years B.P ., when it reached areas rising 260-280 m a.s.l. to stop at western slope of the Roztocze Upland and enter the Sandomierz Depression in the form of lobe. In northern part of the Lublin Upland the icesheet reached margin of the Giełczew elevation and Pagóry Chełmskie hills up to the level of 240-250 m a.s.l. Deglaciation following the maximum stadiał was connected with retreat of the icesheet in several phases. The recession of the Vistula lobe is reflected by glacial accumulation zones of the Zawichost, Chodel, and Nałęczów phases (Fig. 1). The zone exposed at that time was 15 to 90 km wide.
The first of the post-maximum stadials - PuławyUhrusk - was characterized by increase in activity of the icesheet. lt is dated at about 273,000 years B.P., and the next one, Dęblin-Włodawa stadiał - at about 250,000 years B.P. The Odra icesheet disappeared 240,000-230,000 years B.P„ due to marked amelioration of climate, called as the Lublin Interglacial.

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