ORIGINAL ARTICLE
New Insights Into the Genesis of the “Poznań Clays” – Upper Neogene of Poland
1
Polish Geological Institute – National Research Institute, Marine Geology Branch, Gdańsk, Poland
2
Adam Mickiewicz University, Poznań, Poland
3
Polish Geological Institute – National Research Institute, , Warszawa, Poland
Online publication date: 2020-04-18
Publication date: 2020-03-01
Civil and Environmental Engineering Reports 2020;30(1):18-32
KEYWORDS
ABSTRACT
The present study focuses on the upper Neogene deposits, called the “Poznań Clays”, that cover more than 75,000 km2 of Poland. They are situated between the first mid- Polish lignite seam and the glaciogenic deposits of the Pleistocene age. Lithostratigraphically, the “Poznań Clays” belong to the uppermost portion of the lignite-bearing Grey Clays Member and the whole Wielkopolska Member (Poznań Formation). The examined fine-grained sediments include mud-rich floodplain deposits with palaeosol remnants and large sandy-muddy or muddy palaeochannel bodies. Therefore, taking into account facies analysis, cross-sectional geometry, and the planform of the palaeochannels, it can be stated that the “Poznań Clays” formed in the environment of a late Neogene anastomosing river.
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| eISSN: | 2450-8594 |
| ISSN: | 2080-5187 |
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