Petrographic composition and directional properties of tills on the NW surroundings of the Gdánsk Bay, Nothern Poland

• Published in: Geologija
• Main Authors: Woźniak, Piotr Paweł, Czubla, Piotr, Wysiecka, Graźyna, Drapella, Małgorzata
• Format: Article in Journal/Newspaper
• Language: Lithuanian; English
• Published: 2009
• Subjects: Till; Petrographic analysis; Till fabric; Weathering; Vistulian; Pomerania; Poland; Ice Sheet
• Online Access: http://lmavb.lvb.lt/LMAVB:ELABAPDB5850880&prefLang=en_US

In this paper, the authors focus on some selected lithological properties of tills: petrographic composition of the 5-10 mm fraction, petrographic composition of the coarse fraction ( > 20 mm, analysed by the indicator erratics method) and the long axis orientation of clasts. As the study area the authors chose a territory located in Northern Poland on the NW surroundings of the Gdańsk Bay - between Puck and Lake Žarnowieckie. It was found that during the Last Glaciiation the study region was fed mainly from the territory of Sweden, middle and south-eastern Sweden in particular. There existed, in parallel with the dominant (in the study region) NNW ice-sheet advance direction, also another, local ice-sheet advance route manifested in the east, which deposited a till bed in the neighbourhood of Puck.