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The study was conducted in Highlands of Western Curland and Western Žemaiciai plateau, Skuodo district – Ylakių, Aleksandrijos, Sacių ir Skuodo parich, where it was tested Apsės, Kalties, Sarties, Spigino, Gypelkio, Luobos, Satos ir Pragulbos rivers. Studied river valleys on flood plains, terraces and river beds at the bottom sediment samples were collected. In the laboratory they are dried, weighed and beams. Sifting have identified four groups: > 2, 2–1 1 to 0,5 and < 0,5 mm. In addition, sediment particles studied roundnees degree. Glacial melt waters have a direct impact on the surface of the formation relief. Thanks to them, creating a negative linear shape. Glacial melt waters forms necessary for the formation of two conditions: a sufficient amount of water flowing and significant surface slope. West Curland highland river sediments observed uneven distribution of the groups, which allowed the reconstruction process took place glacial melt water intensity. Apsė the upper basin have high fractions of sediment dispersion greater diversity than middle reaches of the basin. This indicates that the upper was intense glacial melt water erosive processes change. Meanwhile, the middle reaches of the long-term was glacial lake. Western Žemaiciu plateau river sediments even noticeable fraction distribution, which allowed the reconstruction process took place glacial melt waters intensity. Luoba basin upstream or downstream sediment fractions of the same dispersion. This indicates that the river carried evenly glacial melt water erosive processes. Meanwhile, the lower reaches of the basin are largely dominated by fine-grained and fine sand, which indicates that there was limnoglace lake, which has affected not only Luoba river basin lowland, but Apsė river basin lowland and middle reaches. West Curland upland furrow bottom sediment granulometry scatter in all workings are pretty even. Most sediment particles in the upper basin polished Apsė and its tributaries (Kaltis, Sartis, Vereta), while at least - Apsė down the river. There is significant correlation between the paleogeographic changes and sediment roundness degree. Western Žemaiciu plateau sediment granulometry spread is even. All workings found in the medium category roundness particles. This reflects the conditions paleogeographic uniformity. Keywords: West Curland highland, Western Žemaiciu plateau, fluvioglacial process, limnoglacial sediments, erosion, denudation, accumulation. DOI: http://dx.doi.org/10.15823/ge.2016.1 |
