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Palaeogeographic reconstruction of the North Podlasie region in the Sokółka area during the Late Pleistocene (NE Poland)

Rychel Joanna

Geological Quarterly

2021

Vol. 65, No. 1

art. no. 12

A new palaeogeographic reconstruction from the end of the Odranian Glaciation to the end of the Weichslian Glaciation (MIS 2) is based on research carried out at the Knyszewicze site, NE Poland, focusing on the dynamics of the Wartanian Glaciation (MIS 6) and showing the lobed nature of this ice sheet. Reconstruction of deglaciation in the research area was supplemented by analysis of postglacial morpholineaments (MMA). Research carried out at the Jałówka site enabled reconstruction of the processes affecting lake processes during the Eemian (MIS 5e) Interglacial and transformation of this area during the Weichselian Glaciation. The results obtained indicated that the study area was not covered by Weichselian ice, the sediments formerly considered as glacial being slope-related and providing evidence of periglacial conditions. A new conceptual model for the evolution of this area is put forward, showing the polygenetic nature of the relief. The glacial landforms developed during the Warta Stadial and transformed during the Eemian Interglacial were further affected by periglacial processes, which significantly remodelled the relief.

Chemical weathering of talus slopes: the example of slopes in the Brattegg Valley, Sw Spitbergen

Senderak K., Wąsowski M.

Studia Geomorphologica Carpatho-Balcanica

2016

Vol. 50

105—122

This paper presents the results of hydrogeochemical surveys carried out in the non-glaciated part of the Brattegg Valley near Hornsund Fjord (SW Spitsbergen). The aim of the study was to indicate places in periglacial zone with the greatest intensity of chemical weathering. The valley was divided into five zones where 11 observation sites were selected. The physico-chemical parameters of water were measured in situ. Water chemical composition was defined using ion chromatograph and mineral composition was obtained based on X-ray diffraction analysis. The results of the study show that in the studied valley, talus slopes are the most dynamic environment of the periglacial zone and are typified by the greatest intensity of chemical weathering.