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Cenozoic dynamics of the Dębina Salt Dome, Kleszczów Graben, inferred from structural features of the Tertiary-Quaternary cover

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Hałuszczak A.

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tom Vol. 74, No 3

311--318

EN

The Dębina Salt Dome (DSD) is located in the central part of the Tertiary Kleszczów Graben, between the open-cast brown coal mines: "Bełchatów" and "Szczerców". Complicated geological features of the DSD are related to the polyphase tectonic activity in the Kleszczów Graben, and the salt structure dynamics which is believed to be coupled with that activity. The distinctive anticlinal elevation of the sedimentary cover of the DSD points to Cenozoic uplift of the salt. The timing of these salt pulses can be considered as related to main phases of tectonic activity in the Tertiary and Quaternary, well-documented during field studies in the brown coal open mine "Bełchatów". Due to the Middle/Late Tertiary salt uplift, a vast asymmetric anticline of up to 400 m amplitude was formed in the Early Miocene sandy and coaly sediments, including the so-called main coal seam. Renewed salt movements of the DSD occurred in the Quaternary. Considering the magnitude of the top-Tertiary surface elevation versus preliminary dating of this activity, it is concluded that the rate of the salt uplift was about 0.3 mm/ year, with the strain rate estimated at 4 x 10-14 s-1. Both parameters show relatively fast Quaternary salt movements of the DSD, being representative for the diapir rise active phase (from 10-14 s-1 to 10-16 s-1 ).

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Middle Pleistocene fluvial, lacustrine and glaciolacustrine sediments of the Czyżów and Kuców Formations (Kuców 9, 10 and 16 sections), Bełchatów outcrop, central Poland – the problem of stratigraphical interpretation

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Krzyszkowski D. , Wachecka-Kotkowska L. , Nita M. , Wieczorek D.

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2021

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tom Vol. 38, Nr 1

53--66

EN

The article presents results of research of three sections (Kuców 9, 10 and 16). Two of them record fluvial and lacustrine interglacial sediments and the third, cold-stage glaciolacustrine sediments. They were formed inside the Miocene–Pliocene syncline depressions in a central part of the southern horst within the Kleszczów Graben. Fluvial and lacustrine deposits of the Middle Pleistocene Interglacial (Mazovian or Ferdynandovian in the Czyżów Formation) are described from the Kuców 9 and 10 sections. Their sediments are located in marginal parts of a buried river valley and within an oxbow palaeolake, then covered by glaciofluvial deposits of the Ławki (Early Saalian) and Rogowiec (Late Saalian) Formations. The Kuców 16 section comprises ice-dam sandy lithofacies (Kuców Formation, Elsterian) of a marginal part in a proglacial lake. Two pollen diagrams of K65/15 and Kuców 9 sections represent the Mazovian (Holsteinian) succession, although in the Kuców 9 section some features are typical for the Ferdinandovian succession.

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PETROGRAPHY OF GLACIAL TILLS IN THE SZCZERCÓW OUT CROP, CENTRAL POLAND – PROBLEMS OF STRATIGRAPHIC INTERPRETATION

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Krzyszkowski D. , Wachecka-Kotkowska L. , Wieczorek D. , Stoiński A.

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tom 32

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Petrography of Glacial Tills in the Szczerców Outcrop, Central Poland – Problems of Stratigraphic Interpretation

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Krzyszkowski D. , Wachecka-Kotkowska L. , Wieczorek D. , Stoiński A.

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tom Vol. 32, Nr 2

99--108

EN

The paper presents results of petrographic analyses of glacial tills in the western part of the Kleszczów Graben and the attempt of their stratigraphic interpretation. Petrographic coefficients have allowed the identification of five till lithotypes: T1, T2A, T2 and T2B – assigned to the South Polish Complex (Elsterian) and T4 correlated with the Middle Polish Complex (Saalian). The well-expressed tills that represent the South Polish Complex, occur at the bottom of the section. A new till lithotype, T2B, has been distinguished, corresponding to the Kuców Formation. It supplements the Pleistocene lithostratigraphic section of central Poland and corresponds to the Sanian 2 Glaciation. Among the younger tills, the T4 one (Odranian Glaciation) is well developed. The uppermost tills of the Wartanian cold stage have been reduced by glaciofluvial and fluvial erosion. It is, to some extent a consequence of the existence of a depression in this area, called the Szczerców Basin. The paper highlights the interpretational difficulties concerning the rank and the number of ice sheet advances during the Polish and Middle Polish Complexes in central Poland.

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Middle Pleistocene fluvial, lacustrine and glaciolacustrine sediments of the Czyżów and Kuców Formations (Kuców 9, 10 and 16 sections), Bełchatów outcrop, central Poland – the problem of stratigraphical interpretation

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Krzyszkowski D. , Wachecka-Kotkowska L. , Nita M. , Wieczorek D. , Krzyszkowski D. , Wachecka-Kotkowska L. , Nita M. , Wieczorek D.

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