EGU23-5495, updated on 22 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Lower Permian sediments of the Intrasudetic Basin: a record of cyclic, climatically-controlled transitions from lacustrine to terrestrial conditions 

Tadeusz Peryt1, Izabela Ploch1, Paweł Raczyński2, Sebastian Voigt3, Hubert Kiersnowski1, and Wojciech Pawlak4
Tadeusz Peryt et al.
  • 1Polish Geological Institute - National Research Institute, Rakowiecka 4, 00-975 Warszawa, Poland
  • 2Institute of Geological Science, University of Wrocław, Pl. Maksa Borna 9, 50-204 Wrocław, Poland
  • 3Urweltmuseum GEOSKOP, Burg Lichtenberg, Burgstraße 19, 66871 Thallichtenberg, Germany
  • 4Department of Biology, University of Warsaw, Miecznikowa 1, 02-089 Warszawa, Poland

The geology of the Intrasudetic Basin (Poland and Czech Republic) in the past was studied separately in both countries. Our project combined data from both parts of the basin to study the development of the limnic basin during the seasonally extreme climate in the Early Permian. The Lower Rotliegend Słupiec Formation (Broumov Formation in the Czech part) red bed deposits appear the most promising for palaeoenvironmental and palaeoclimatic studies. Fine-grained weathering products  (black shales), tuff admixtures and autochthonous components (limestones) in lakes contain many remains of plants, and traces of activity of invertebrates and vertebrates including extraordinarily numerous traces fossils of tetrapods (reptiles and amphibians) (e.g., Voigt et al. 2012) and fish remains (e.g., Stamberg & Zajíc, 2008). The Słupiec Formation is interpreted as a successively finning-upwards megacyclothem consisting, from base to top, of alluvial fan, fluvial and lacustrine deposits (Wojewoda and Mastalerz, 1989; Kurowski, 2004). However, the cyclicity is also clearly marked by successive transitions from lacustrine sediments with preserved fish remains to terrestrial sediments with numerous tracks of terrestrial reptiles and amphibians. This seasonal climate with dominant monsoonal rainy summer and winter seasons with low precipitation is clearly recorded in deposits of alluvial-fluvial plains and lakes. Extreme weather conditions, such as possible night frosts, were also recorded in the sediments, although the basin was located relatively close to the equator.

This research was funded by the Polish National Science Centre (Grant 017/26/M/ST10/00646).

Kurowski, L. (2004); Geologia Sudetica, 36: 21–38; Štamberg, S. & Zajíc, J. (2008): Carboniferous and Permian faunas and their occurrence in the limnic basins of the Czech Republic. Museum of Eastern Bohemia; Voigt, S., Niedźwiedzki, G., Raczyński, P., Mastalerz, K. & Ptaszyński, P. (2012): Palaeogeography, Palaeoclimatology, Palaeoecology, 313-314: 173-180; Wojewoda, J. & Mastalerz, K. (1989): Przegląd Geologiczny, 37: 173–180.

How to cite: Peryt, T., Ploch, I., Raczyński, P., Voigt, S., Kiersnowski, H., and Pawlak, W.: Lower Permian sediments of the Intrasudetic Basin: a record of cyclic, climatically-controlled transitions from lacustrine to terrestrial conditions , EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-5495,, 2023.