<abstract xmlns="http://www.w3.org/1999/xhtml"><p> During the Pomeranian phase of the Weichselian glaciation (~17-16 ka), the Toruń-Eberswalde ice-marginal valley (NW Poland and easternmost Germany) drained water from the Pomeranian ice sheet, while intensive aeolian processes took place across Europe in the foreland of the Scandinavian ice sheet (‘European Sand Belt’). The micromorphology of the quartz grains in the Toruń-Eberswalde ice-marginal valley shows no traces of these aeolian processes, or only vague signs of aeolian abrasion. This is unique among the aeolian sediments in other Pleistocene ice-marginal valleys in this part of Europe. The study of the surfaces of the quartz grains shows that the supply of grains by streams from the south was minimal, which must be ascribed to the climate deterioration during the Last Glacial Maximum, which resulted in a decrease of the discharge of these extraglacial rivers to the ice-marginal valley.</p></abstract>

During the Pomeranian phase of the Weichselian glaciation (~17-16 ka), the Toruń-Eberswalde ice-marginal valley (NW Poland and easternmost Germany) drained water from the Pomeranian ice sheet, while intensive aeolian processes took place across Europe in the foreland of the Scandinavian ice sheet (‘European Sand Belt’). The micromorphology of the quartz grains in the Toruń-Eberswalde ice-marginal valley shows no traces of these aeolian processes, or only vague signs of aeolian abrasion. This is unique among the aeolian sediments in other Pleistocene ice-marginal valleys in this part of Europe. The study of the surfaces of the quartz grains shows that the supply of grains by streams from the south was minimal, which must be ascribed to the climate deterioration during the Last Glacial Maximum, which resulted in a decrease of the discharge of these extraglacial rivers to the ice-marginal valley.

Reconstruction of sediment provenance and transport processes from the surface textures of quartz grains from Late Pleistocene sandurs and an ice-marginal valley in NW Poland

Faculty of Geology, University of Warsaw, Żwirki i Wigury 93, 02-089 Warsaw, Poland;

Institute of Geology, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznań, Poland;

Institute of Geology, Adam Mickiewicz University, Maków Polnych 16, 61-606 Poznań, Poland

Geologos

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

During the Pomeranian phase of the Weichselian glaciation (~17-16 ka), the Toruń-Eberswalde ice-marginal valley (NW Poland and easternmost Germany) drained...

Reconstruction of sediment provenance and transport processes from the surface textures of quartz grains from Late Pleistocene sandurs and an ice-marginal valley in NW Poland

Online veröffentlicht: 29. Juli 2015

Seitenbereich: 105 - 115

Eingereicht: 27. Jan. 2015

Akzeptiert: 10. Mai 2015

DOI: https://doi.org/10.1515/logos-2015-0007

Schlüsselwörter
quartz-grain micromorphology, ice-marginal valley, sandur, Weichselian glaciation, Poland

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Reconstruction of sediment provenance and transport processes from the surface textures of quartz grains from Late Pleistocene sandurs and an ice-marginal valley in NW Poland

Online veröffentlicht: 29. Juli 2015

Seitenbereich: 105 - 115

Eingereicht: 27. Jan. 2015

Akzeptiert: 10. Mai 2015

DOI: https://doi.org/10.1515/logos-2015-0007

Schlüsselwörterquartz-grain micromorphology, ice-marginal valley, sandur, Weichselian glaciation, Poland

© 2015

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Schlüsselwörter
quartz-grain micromorphology, ice-marginal valley, sandur, Weichselian glaciation, Poland