Roundness and matt degree of quartz grain surfaces in (fluvio-)glacial deposits of the Pomeranian Stage (Weichselian) in northeast Germany
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Date
2015-06
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Instytut Geologii UAM
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Abstract
Glacial tills and fluvioglacial sediments deposited by the ice-sheet during the Pomeranian Stage (Weichselian) in north -east Germany have been examined in terms of the degree of abrasion, rounding and frosting of quartz grain surfaces
in order to determine the conditions and processes that occurred in the alimentation environment of the fine-grained
material, as well as during transport. Strata in the glaciomarginal zone and the hinterland of the Pomeranian Stage in
the area represent diverse lithofacies, but have similar textural features. These features illustrate mainly that a high-en -ergy aquatic environment had reacted with glacial deposits prior to their inclusion into the ice mass and deposited in
the area covered by the Odra lobe. The lack of regional diversification in the character of quartz grain surfaces in glacial
deposits between the German part of the Odra lobe and the remainder of the area analysed is recorded solely in the
morphological dimension, i.e. the outlet fragment of the ice-front’s course, but not in textural features of the sediments.
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Keywords
textural analysis, quartz grains, Pomeranian Stage, Mecklenburg-Vorpommern, Uckermark
Citation
Geologos, 2015, 21, 2, s. 117-125.
ISBN
978-83-232187-4-6