Tomasz Zieliński | Adam Mickiewicz University in Poznań (original) (raw)

Papers by Tomasz Zieliński

Geologos, 2014

Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical pr... more Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical properties of biogenic sediments were applied to a small valley mire in order to identify the processes that lead to the formation of various types of peat. A sequential Gaussian simulation was performed to reproduce the statistical distribution of the input data (pH and organic matter) and their semivariances, as well as to honouring of data values, yielding more ‘realistic’ models that show microscale spatial variability, despite the fact that the input sample cores were sparsely distributed in the X-Y space of the study area. The stratigraphy of peat deposits in the Ldzań mire shows a record of long-term evolution of water conditions, which is associated with the variability in water supply over time. Ldzań is a fen (a rheotrophic mire) with a through-flow of groundwater. Additionally, the vicinity of the Grabia River is marked by seasonal inundations of the southwest part of the mire a...

Annales Societatis Geologorum Poloniae

Annales Societatis …, 2000

Abstract: The studied section of the upper Narew river is an example of an anastomosing system. I... more Abstract: The studied section of the upper Narew river is an example of an anastomosing system. It consists of a network of interconnected channels and interchannel areas covered with peat-forming rush and reed vegetation. The channels have low longitudinal gradient, ...

Geological Quarterly, 2014

Annales Societatis Geologorum Poloniae, 2021

Palaeogeography, Palaeoclimatology, Palaeoecology, 2015

Boreas, 2015

ABSTRACT This study investigated the Grabia River valley mire in central Poland to reconstruct it... more ABSTRACT This study investigated the Grabia River valley mire in central Poland to reconstruct its palaeoenvironmental conditions from the Younger Dryas to the present. We analysed sedimentological, biological and geochemical data from the palaeo-oxbow lake and valley mire to identify the principal hydrological trends, especially episodes of high water level. During the Lateglacial and Holocene, the Grabia River had a meandering channel, and its hydraulic parameters and the channel dimensions changed in response to climatic oscillations and vegetation development. We identified phases of high flood intensity and high groundwater level that correlate with regional and supraregional climatic events. The frequency and timing of palaeohydroclimatic oscillations show strong similarities to records from other sites in Poland and the rest of Europe. We show that various analytical methods, namely, pollen, plant macrofossils, Cladocera, Chironomidae, sedimentological, geochemical and radiocarbon data, can be effective tools for reconstructing past hydroclimatic changes in palaeo-oxbow lakes and investigating the effects of past climate changes on river environments. The high sensitivity of the biota, especially Cladocera, to changes in water level permits the reconstruction of palaeoecological changes, especially flood episodes that occurred in the river valley. In particular, the increase in the proportion of sediment-associated Cladocera and pelagic taxa was closely correlated with floods. Through comparisons with the palaeobiological data, geochemical data allowed the identification of humid phases within the fen associated with a rising groundwater table, direct fluvial activity (floods) and alluvial deposition. We also discuss the limitations of palaeohydrological reconstructions based on these proxies, especially on fossil aquatic invertebrates.

STRATI 2013, 2014

This paper describes a unique succession of alluvial deposits from the Holsteinian Interglacial i... more This paper describes a unique succession of alluvial deposits from the Holsteinian Interglacial in eastern Poland. The succession was studied in terms of sedimentology, palaeobotany, and thermoluminescence (TL) geochronology. The interglacial alluvial succession includes two facies of a meandering river: point bar and oxbow. TL ages of point bar deposits and palaeobotanical analysis of oxbow lake deposits allow us to associate the deposits with the initial phases (preoptimum period) of the Holsteinian Interglacial. Specific palaeoenvironmental conditions did not favour the formation of a complete interglacial biogenic–clastic succession as it was deposited in the shallow oxbow lake, which underwent rapid eutrophication.

SEPM Journal of Sedimentary Research, 1995

Geografiska Annaler: Series A, Physical Geography, 2012

Abstract The Pleistocene Cieśle succession accumulated in a subglacial tunnel and shows three sed... more Abstract The Pleistocene Cieśle succession accumulated in a subglacial tunnel and shows three sedimentological units: (1) trough cross‐stratified sand with granules deposited in deep channels up to 5.4 m, (2) trough stratified and massive gravels deposited in a very deep channel up to 6.2 m eroded by a catastrophic hyperconcentrated flow, and (3) a massive diamicton, interpreted as a basal till of melt‐out type. We focus on angular and deformed sandy clasts that occur in the second unit. It appears that thermal erosion, short transport in a sediment‐laden current and sudden sedimentation were responsible for the oversized sandy clasts that occur in the gravel glaciofluvial deposits. The deposits are characterized by large‐scale erosional scours, massive structure, and fluid‐escape deformations. This combination of features can be used as a key tool for the interpretation of hyperconcentrated‐flow conditions beneath Pleistocene ice sheets.

Annales Societatis Geologorum Poloniae, 1980

Fluvioglacial depositional structures in Belchatow, Central Poland In the brown coal bearing depo... more Fluvioglacial depositional structures in Belchatow, Central Poland In the brown coal bearing deposits in Belchatow, Central Poland, numerous erosional washouts have been observed. These occur within a series of fine-,grained Pleistocene fluvioglacial sands (Fig. 1) and have dimensions of up to 7 m in length, 3.5 m width, and 1.8 m in depth, and are infilled with well-sorted, finegrained sands. In the upcurrent direction of the washouts inclined parallel-laminated sets are found to occur, — the so-called a -member (Fig. 4A; Pl. 1, Fig. 1; Pl. II, Fig. 2). These are derived from the avalanche-like sedimentation of material transported to the edge of the washout by migrating ripples. In the downcurrent direction, this type of lamination grades into small-scale trough cross lamination — the b -member, and climbing-ripple cross lamination, named the с -member. (Fig. 4A; Pl. 1, Fig. 1). In the с -member the following sequences have been observed; Horizontally, in the direction of flow, A—...

Geological Quarterly, 2015

Quaternary Science Reviews, 2016

Abstract: The developmental history, from the Oldest Dryas to the Late Holocene, of a paleolake a... more Abstract: The developmental history, from the Oldest Dryas to the Late Holocene, of a paleolake and mire located in a river valley in Central Poland was studied using high-resolution records of pollen, macrofossils, Cladocera, sedimentology, and geochemistry from a 14 C dated sediment core. We inferred temperature and water level dynamics using cladocerans and palynological and geochemical methods were employed to investigate natural fluvial activity, particularly for these elements that are difficult to find through sedimentological methods. Our research demonstrates how climate fluctuation in the Late Glacial and Holocene periods influenced the development of a paleolake and mire in a small river valley and shows the importance of long-term research to establish hydroclimatic conditions in biogenic sediments. We propose that water level fluctuations were important in modifying biotic assemblages. The results of our multiproxy analysis clearly suggest that the main driver of changes in aquatic and terrestrial ecosystems, as well as in geomorphological processes in the valley, was climate: reconstructed temperatures generally follow the known trends, showing an increase at the beginning of the Bolling, Allerod, and Holocene and a decrease at the beginning of the Oldest and Younger Dryas. Similarly, periods of water level increase are synchronous with climatic changes. However, the local environmental forces were a significant factors affecting biotic diversity in the studied time span. Fish predation, macrophyte structure, pH, and calcium content partly influence the results of the cladoceran-based water depth reconstruction in particular. Interestingly, the cladoceran-inferred summer temperature reconstruction for Pawlowa appear realistic. Although the temperature trends can be considered reliable, our results indicate the important role of local factors which control the species composition of the subfossil assemblages.

Palaeogeography, Palaeoclimatology, Palaeoecology

Geologos

The present study revolves around the identification of the stratigraphical boundary between Plei... more The present study revolves around the identification of the stratigraphical boundary between Pleistocene formations that formed prior to the first advance of the Scandinavian ice sheet (Early Pleistocene, i.e., the so-called preglacial) and the overlying, glacially derived deposits (Middle Pleistocene). In particular, it focuses on variation in heavy mineral assemblages, which are an important tool for stratigraphers. The Neogene basement, described here, was most often the source of material that was redeposited by Early Pleistocene rivers. The geological structure and Early Pleistocene palaeogeographical scenarios for various Polish regions are discussed. Moreover, comparisons with other European preglacial formations are carried out. The mineral spectrum of Lower Pleistocene deposits is largely dependent of rocks of the Neogene and Mesozoic basement. If the incision of ancient catchments was into terrigenous rocks, the stratigraphical boundary between preglacial and glacial forma...

Geologos, 2014

Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical pr... more Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical properties of biogenic sediments were applied to a small valley mire in order to identify the processes that lead to the formation of various types of peat. A sequential Gaussian simulation was performed to reproduce the statistical distribution of the input data (pH and organic matter) and their semivariances, as well as to honouring of data values, yielding more ‘realistic’ models that show microscale spatial variability, despite the fact that the input sample cores were sparsely distributed in the X-Y space of the study area. The stratigraphy of peat deposits in the Ldzań mire shows a record of long-term evolution of water conditions, which is associated with the variability in water supply over time. Ldzań is a fen (a rheotrophic mire) with a through-flow of groundwater. Additionally, the vicinity of the Grabia River is marked by seasonal inundations of the southwest part of the mire a...

Annales Societatis Geologorum Poloniae

Annales Societatis …, 2000

Abstract: The studied section of the upper Narew river is an example of an anastomosing system. I... more Abstract: The studied section of the upper Narew river is an example of an anastomosing system. It consists of a network of interconnected channels and interchannel areas covered with peat-forming rush and reed vegetation. The channels have low longitudinal gradient, ...

Geological Quarterly, 2014

Annales Societatis Geologorum Poloniae, 2021

Palaeogeography, Palaeoclimatology, Palaeoecology, 2015

Boreas, 2015

ABSTRACT This study investigated the Grabia River valley mire in central Poland to reconstruct it... more ABSTRACT This study investigated the Grabia River valley mire in central Poland to reconstruct its palaeoenvironmental conditions from the Younger Dryas to the present. We analysed sedimentological, biological and geochemical data from the palaeo-oxbow lake and valley mire to identify the principal hydrological trends, especially episodes of high water level. During the Lateglacial and Holocene, the Grabia River had a meandering channel, and its hydraulic parameters and the channel dimensions changed in response to climatic oscillations and vegetation development. We identified phases of high flood intensity and high groundwater level that correlate with regional and supraregional climatic events. The frequency and timing of palaeohydroclimatic oscillations show strong similarities to records from other sites in Poland and the rest of Europe. We show that various analytical methods, namely, pollen, plant macrofossils, Cladocera, Chironomidae, sedimentological, geochemical and radiocarbon data, can be effective tools for reconstructing past hydroclimatic changes in palaeo-oxbow lakes and investigating the effects of past climate changes on river environments. The high sensitivity of the biota, especially Cladocera, to changes in water level permits the reconstruction of palaeoecological changes, especially flood episodes that occurred in the river valley. In particular, the increase in the proportion of sediment-associated Cladocera and pelagic taxa was closely correlated with floods. Through comparisons with the palaeobiological data, geochemical data allowed the identification of humid phases within the fen associated with a rising groundwater table, direct fluvial activity (floods) and alluvial deposition. We also discuss the limitations of palaeohydrological reconstructions based on these proxies, especially on fossil aquatic invertebrates.

STRATI 2013, 2014

This paper describes a unique succession of alluvial deposits from the Holsteinian Interglacial i... more This paper describes a unique succession of alluvial deposits from the Holsteinian Interglacial in eastern Poland. The succession was studied in terms of sedimentology, palaeobotany, and thermoluminescence (TL) geochronology. The interglacial alluvial succession includes two facies of a meandering river: point bar and oxbow. TL ages of point bar deposits and palaeobotanical analysis of oxbow lake deposits allow us to associate the deposits with the initial phases (preoptimum period) of the Holsteinian Interglacial. Specific palaeoenvironmental conditions did not favour the formation of a complete interglacial biogenic–clastic succession as it was deposited in the shallow oxbow lake, which underwent rapid eutrophication.

SEPM Journal of Sedimentary Research, 1995

Geografiska Annaler: Series A, Physical Geography, 2012

Abstract The Pleistocene Cieśle succession accumulated in a subglacial tunnel and shows three sed... more Abstract The Pleistocene Cieśle succession accumulated in a subglacial tunnel and shows three sedimentological units: (1) trough cross‐stratified sand with granules deposited in deep channels up to 5.4 m, (2) trough stratified and massive gravels deposited in a very deep channel up to 6.2 m eroded by a catastrophic hyperconcentrated flow, and (3) a massive diamicton, interpreted as a basal till of melt‐out type. We focus on angular and deformed sandy clasts that occur in the second unit. It appears that thermal erosion, short transport in a sediment‐laden current and sudden sedimentation were responsible for the oversized sandy clasts that occur in the gravel glaciofluvial deposits. The deposits are characterized by large‐scale erosional scours, massive structure, and fluid‐escape deformations. This combination of features can be used as a key tool for the interpretation of hyperconcentrated‐flow conditions beneath Pleistocene ice sheets.

Annales Societatis Geologorum Poloniae, 1980

Fluvioglacial depositional structures in Belchatow, Central Poland In the brown coal bearing depo... more Fluvioglacial depositional structures in Belchatow, Central Poland In the brown coal bearing deposits in Belchatow, Central Poland, numerous erosional washouts have been observed. These occur within a series of fine-,grained Pleistocene fluvioglacial sands (Fig. 1) and have dimensions of up to 7 m in length, 3.5 m width, and 1.8 m in depth, and are infilled with well-sorted, finegrained sands. In the upcurrent direction of the washouts inclined parallel-laminated sets are found to occur, — the so-called a -member (Fig. 4A; Pl. 1, Fig. 1; Pl. II, Fig. 2). These are derived from the avalanche-like sedimentation of material transported to the edge of the washout by migrating ripples. In the downcurrent direction, this type of lamination grades into small-scale trough cross lamination — the b -member, and climbing-ripple cross lamination, named the с -member. (Fig. 4A; Pl. 1, Fig. 1). In the с -member the following sequences have been observed; Horizontally, in the direction of flow, A—...

Geological Quarterly, 2015

Quaternary Science Reviews, 2016

Abstract: The developmental history, from the Oldest Dryas to the Late Holocene, of a paleolake a... more Abstract: The developmental history, from the Oldest Dryas to the Late Holocene, of a paleolake and mire located in a river valley in Central Poland was studied using high-resolution records of pollen, macrofossils, Cladocera, sedimentology, and geochemistry from a 14 C dated sediment core. We inferred temperature and water level dynamics using cladocerans and palynological and geochemical methods were employed to investigate natural fluvial activity, particularly for these elements that are difficult to find through sedimentological methods. Our research demonstrates how climate fluctuation in the Late Glacial and Holocene periods influenced the development of a paleolake and mire in a small river valley and shows the importance of long-term research to establish hydroclimatic conditions in biogenic sediments. We propose that water level fluctuations were important in modifying biotic assemblages. The results of our multiproxy analysis clearly suggest that the main driver of changes in aquatic and terrestrial ecosystems, as well as in geomorphological processes in the valley, was climate: reconstructed temperatures generally follow the known trends, showing an increase at the beginning of the Bolling, Allerod, and Holocene and a decrease at the beginning of the Oldest and Younger Dryas. Similarly, periods of water level increase are synchronous with climatic changes. However, the local environmental forces were a significant factors affecting biotic diversity in the studied time span. Fish predation, macrophyte structure, pH, and calcium content partly influence the results of the cladoceran-based water depth reconstruction in particular. Interestingly, the cladoceran-inferred summer temperature reconstruction for Pawlowa appear realistic. Although the temperature trends can be considered reliable, our results indicate the important role of local factors which control the species composition of the subfossil assemblages.

Palaeogeography, Palaeoclimatology, Palaeoecology

Geologos

The present study revolves around the identification of the stratigraphical boundary between Plei... more The present study revolves around the identification of the stratigraphical boundary between Pleistocene formations that formed prior to the first advance of the Scandinavian ice sheet (Early Pleistocene, i.e., the so-called preglacial) and the overlying, glacially derived deposits (Middle Pleistocene). In particular, it focuses on variation in heavy mineral assemblages, which are an important tool for stratigraphers. The Neogene basement, described here, was most often the source of material that was redeposited by Early Pleistocene rivers. The geological structure and Early Pleistocene palaeogeographical scenarios for various Polish regions are discussed. Moreover, comparisons with other European preglacial formations are carried out. The mineral spectrum of Lower Pleistocene deposits is largely dependent of rocks of the Neogene and Mesozoic basement. If the incision of ancient catchments was into terrigenous rocks, the stratigraphical boundary between preglacial and glacial forma...

Na obszarze nadbużańskiego Podlasia (w pasie granicznym z Białorusią) linia maksymalnego zasięgu ... more Na obszarze nadbużańskiego Podlasia (w pasie granicznym z Białorusią) linia maksymalnego zasięgu lądolodu Warty była różnie kreślona (fig. 1A). Jego nasunięcie po Mielnik przyjmował Zaborski (1927), a na nieco większy (po okolice Niemirowa), wskazywali Rühle i Mojski (1968). Znacznie większy zasięg lądolodu (po Łęgi lub okolice Janowa Podlaskiego) kreślili Lindner (1988) oraz Marks i Pavlovskaya (2006), a największy (po Terespol) wyznaczała Nowak (1973).
Z nowszych szczegółowych badań geologicznych Nitychoruka i in. (2006) wynika, że czoło lądolodu Warty w swym maksymalnym rozprzestrzenieniu sięgnęło po linię Mielnik – Niemirów. Tej koncepcji zdają się przeczyć zbieżne wyniki analizy porównawczej składu narzutniaków przewodnich najmłodszej serii glin lodowcowych w stanowiskach Mielnik i Neple, zlokalizowanych w obrębie form marginalnych położonych na linii najmniejszego (stanowisko Mielnik) i zapleczu największego rozprzestrzenienia lądolodu Warty (stanowisko Neple) – Czubla i in. (2010). Sugerują one transgresję lądolodu w formie lobu Bugu po Neple, czyli dalej na południe.
W stanowisku Mielnik prezentujemy wyniki badań osadów moreny czołowej – formy zaliczanej do moren końcowych lądolodu Warty (Nitychoruk i in. 2006), w obrębie której przeprowadzona była analiza petrograficzna składu narzutniaków przewodnich z najmłodszego poziomu glin lodowcowych (Czubla i in. 2010).