<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The petrographical features of the medium- and coarse-grained gravels (4-10 mm and 20-60 mm, respectively) of weathered and fresh (unweathered) deposits indicate, in combination with so-called indicator and statistical erratics, that two glacial lobes joined in the borderland of the Polish Lowlands and Uplands. Lower Palaeozoic limestones become less frequent in the fner gravel fraction, whereas crystalline rocks and fints become more frequent. The petrographical analysis of the coarser gravel fraction indicates that the ice sheet advanced from the NE to NNW (the Widawka lobe) and from the NE to ENE (the Rawka, Pilica and Luciąża lobes). The source areas of the gravel deposited by the Warthian ice sheet were magmatic and sedimentary areas of both the Baltic and the SE Sweden basins.</p></abstract>

The petrographical features of the medium- and coarse-grained gravels (4-10 mm and 20-60 mm, respectively) of weathered and fresh (unweathered) deposits indicate, in combination with so-called indicator and statistical erratics, that two glacial lobes joined in the borderland of the Polish Lowlands and Uplands. Lower Palaeozoic limestones become less frequent in the fner gravel fraction, whereas crystalline rocks and fints become more frequent. The petrographical analysis of the coarser gravel fraction indicates that the ice sheet advanced from the NE to NNW (the Widawka lobe) and from the NE to ENE (the Rawka, Pilica and Luciąża lobes). The source areas of the gravel deposited by the Warthian ice sheet were magmatic and sedimentary areas of both the Baltic and the SE Sweden basins.

Petrographical Analysis of Warthian Fuvioglacial Gravels as a Tool to Trace the Source Area – A Case Study From Central Poland

Institute of Geoecology and Geoinformation, Adam Mickiewicz University, Dzięgielowa 27, 61-680 Poznań, Poland

Department of Geomorphology and Palaeogeography, Faculty of Geographical Sciences, University of Łódź, Narutowicza 88, 90-139 Łódź, Poland

Geologos

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

The petrographical features of the medium- and coarse-grained gravels (4-10 mm and 20-60 mm, respectively) of weathered and fresh (unweathered) deposits...

Petrographical Analysis of Warthian Fuvioglacial Gravels as a Tool to Trace the Source Area – A Case Study From Central Poland

Pubblicato online: 23 ott 2014

Pagine: 183 - 199

Ricevuto: 21 gen 2014

Accettato: 06 ago 2014

DOI: https://doi.org/10.2478/logos-2014-0014

Parole chiave
gravel petrography, indicator erratics, fuvioglacial deposits, Warthian stadial, central Poland

© 2014 Maria Górska-Zabielska and Lucyna Wachecka-Kotkowska

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

Petrographical Analysis of Warthian Fuvioglacial Gravels as a Tool to Trace the Source Area – A Case Study From Central Poland

Pubblicato online: 23 ott 2014

Pagine: 183 - 199

Ricevuto: 21 gen 2014

Accettato: 06 ago 2014

DOI: https://doi.org/10.2478/logos-2014-0014

Parole chiavegravel petrography, indicator erratics, fuvioglacial deposits, Warthian stadial, central Poland

© 2014 Maria Górska-Zabielska and Lucyna Wachecka-Kotkowska

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

Parole chiave
gravel petrography, indicator erratics, fuvioglacial deposits, Warthian stadial, central Poland