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80 lat Kopalni Węgla Brunatnego Konin. Część II : postęp badań geologicznych

Widera Marek

Przegląd Geologiczny

2025

Vol. 73, nr 1

18--26

Geological research is inextricably linked to the exploration of lignite deposits and their exploitation by the Konin Lignite Mine (KWB Konin/. Drilling data and, above all, observations made in opencast mines have provided a lot of valuable information about the geology of this part of central Poland. Despite the mining of mid-Miocene lignite, ‘Tertiary’ sediments were studied in 1945-1966 and mainly Quaternary sediments in 1967-1995. On the contrary, the last 30 years (1996-2025) have been dominated by research on Neogene sediments in the KWB Konin opencasts, although older and younger sediments have also been examined. In this way, the stratigraphy of the Quaternary was first learned, and then many discoveries of sediments, forms and structures were made within the Neogene succession. As a result, some sites in the vicinity of the town of Konin are considered stratotypes for the Quaternary and Neogene stratigraphy of the Polish Lowlands. Moreover, some of the new geological discoveries in the Neogene beds are unique in Poland, Europe and even in the world. None of these achievements would have been possible without the 80 years of mining activity of the KWB Konin.

A new approach to analysing the origin and occurrence of amber-bearing deposits of the Upper Eocene, northern Lublin area, SE Poland

Karnkowski Paweł H., Kasiński Jacek R., Słodkowska Barbara, Czuryłowicz Krzysztof, Żarski Marcin

Geological Quarterly

2024

Vol. 68, No. 3

art. no. 26

Eocene sedimentation in the Lublin region reached its peak in the Middle Eocene, followed by a regression in the Late Eocene, which was accompanied by accumulation of significant amber deposits in the North Lublin area. These deposits, located along the south-eastern coast of the Eocene, reflect the abundant resin production in diverse forests during the climatic optimum of the Eocene. Recent research has challenged the earlier notion that amber deposits formed in river deltas and linked them to regressive marine facies. Amber is typically found in low-energy, regressive rock layers such as silt and sand, and its distribution could be significantly affected by environmental changes influencing its secondary occurrence. A recent study focusing on the North Lublin region modelled the structural surface of the Upper Cretaceous to identify areas of amber-bearing deposits. Using data from the PITAKA, Bank HYDRO and Central Geological Archive databases, a comprehensive surface of the Upper Cretaceous at the sub-basin scale was created using ArcGIS software. This approach enabled a better understanding of the paleo-depositional subsurface of the Paleogene deposits. The analysis identified 84 different amber-bearing fields covering a total area of 891.5 km2, which corresponds to almost 14% of the study area in the northern Lublin region. These results emphasise the influence of the palaeomorphology of the Late Eocene basin on sediment dynamics in amber-bearing areas. This paper describes a new depositional model for the Eocene amber-bearing formations in the Lublin region and indicates potential amber deposits in this region.