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    Wyświetlanie 1-8 z 8
    Tytuł:
    Skład chemiczny osadów organicznych ze stanowiska Koźmin Las
    Chemical composition of organic sediments from the Koźmin Las site
    Autorzy:
    Okupny, Daniel
    Borówka, Ryszard
    Fortuniak, Anna
    Tomkowiak, Julita
    Powiązania:
    https://bibliotekanauki.pl/articles/1366119.pdf
    Data publikacji:
    2014
    Wydawca:
    Łódzkie Towarzystwo Naukowe
    Tematy:
    osady organiczne
    dolina rzeczna
    geochemia
    Polska Środkowa
    organic sediments
    river valley
    geochemistry
    central Poland
    Opis:
    W oparciu o wyniki składu chemicznego osadów organicznych w stanowisku Koźmin Las, przedstawiono rekonstrukcję warunków środowiskowych doliny Warty pod koniec allerödu i w młodszym dryasie. Do rekonstrukcji wykorzystano dane dotyczące zawartości materii organicznej, materii mineralnej, węglanu wapnia, odczynu oraz koncentracji makro- (Na, K, Mg, Ca, Fe, Mn) i mikropierwiastków (Cu, Zn i Pb). Do czynników kształtujących skład chemiczny późnovistuliańskich osadów organicznych w dolinie Warty zaliczono sorpcję metali przez materię organiczną i uwodnione tlenki żelaza, zmien-ność akumulacji minerałów ilastych w środowisku sedymentacyjnym, sposób zasilania ekosystemu oraz właściwości aku-mulacyjne roślin w stosunku do określonych pierwiastków.
    The chemical composition of organic deposits from the site Koźmin Las are the basis of reconstruction of envi-ronment conditions of the Warta River valley at the end of the Alleröd and in the Younger Dryas. Environmental archives presented in this study, comprise organic matter content, mineral matter content, calcium carbonate content, reaction and macro- (Na, K, Mg, Ca, Fe, Mn) and microelements (Cu, Zn and Pb). The sorption of metals by organic matter and hydrated iron oxides, clay minerals accumulation variability in depositional environment, water relations of the ecosystem and bioac-cumulation of some elements are the factors determining the chemical composition of organic sediments in the Warta river valley.
    Źródło:
    Acta Geographica Lodziensia; 2014, 102; 71-86
    0065-1249
    Pojawia się w:
    Acta Geographica Lodziensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lithology and geochemistry of the Late Glacial and Holocene sediments from Gostyń Lake (Western Pomerania, Myślibórz Lakeland)
    Autorzy:
    Korzeniowski, Andrzej
    Okupny, Daniel
    Michczyński, Adam
    Sławińska, Joanna
    Borówka, Ryszard K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1366047.pdf
    Data publikacji:
    2020-12-24
    Wydawca:
    Łódzkie Towarzystwo Naukowe
    Tematy:
    lakes
    biogenic deposits
    geochemistry
    human impact
    Holocene
    western Poland
    Opis:
    Sediment geochemistry and lithology were studied in Gostyń Lake in the eastern part of the Myślibórz Lakeland (part of the Western Pomeranian Lake District). The research was undertaken because relatively shallow lake basins without ground supply contribute to the intensification of water circulation through evaporation. Late Glacial and Holocene phases in the evolution of Gostyń Lake were reconstructed based on selected geochemical indicators (Fe/Mn, S/Fe, Na/K, Mg/Ca, Cu/Zn, Na+K+Mg/Ca, Fe/Ca) as well as on the presence of human activity (Stone Age, Bronze Age, Early Iron Age and Roman Period). Also, the geochemical and archaeological data were correlated. Generally, the lithogeochemical composition variability in the Gostyń Lake deposits was found to be controlled by changes in: 1) the climate, related to the biogenic accumulation environment, 2) land cover in the Late Glacial and Holocene, and 3) human activities. Principal Component Analysis (PCA) revealed four major variable groups responsible for the changes: hydroclimatic variations which determined the type of sedimentary conditions during the Holocene climate optimum; changes in the organic matter provenance (along with conditions favouring sulphide precipitation); and denudation processes in the Gostyń Lake catchment. The methods used allowed the distribution of ancient settlement to be traced. Interpretation of the geochemical indicators (Fe/Mn, Cu/Zn, S/Fe, Ca/Fe) should involve many more factors which, in the relevant literature, are treated as measures of changes in redox conditions
    Źródło:
    Acta Geographica Lodziensia; 2020, 110; 149-168
    0065-1249
    Pojawia się w:
    Acta Geographica Lodziensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stages of the formation of the Łeba barrier-lagoon system on the basis of the geological cross-section near Rąbka (Southern Baltic Coast, Poland)
    Autorzy:
    Rotnicki, Karol
    Alexandrowicz, Stefan W.
    Pazdur, Anna
    Goslar, Tomasz
    Borówka, Ryszard K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2026416.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sand barriers
    lagoons
    Holocene barrier- lagoon system
    Polska
    southern Baltic coast
    Opis:
    The ar ti cle pres ents the re sults of a de tailed study of the geo log i cal struc ture of the £eba Bar rier in the R¹bka crosssec tion (South ern Bal tic, Po land). The bar rier sep a rates Lake £ebsko from the Bal tic. Five sed i men tary com plexes were dis tin guished there (M2–M6). The spa tial vari abil ity of the grain-size dis tri bu tion was ex am ined and suc ces sion stages of the mol lusc fauna oc cur ring in the in di vid ual sed i men tary com plexes were dis tin guished. Ra dio car bon dating was used to es tab lish the age of the most im por tant events dur ing the pro cess of for ma tion of the bar rier, which took place in the course of sev eral rel a tive sea-level changes. The first sed i men tary com plex (M2) at R¹bka is connected with the sec ond ingression (i2) of the Bal tic Sea (ca. 6,700–6,000 14C years BP), sea-level sta bi li za tion (6,000–5,500 14C years BP), and at last sea-level low er ing (5,500–5,000 14C years BP) in the re gion of the Gardno-£eba Coastal Plain. The sed i men tary com plex M3 de vel oped in a la goonal en vi ron ment when the bar rier was sit u ated north of its pres ent po si tion (5,000–3,000 14C BP). The next low er ing of the sea-level made the la goon shal lower and caused the emer gence of small but al ready subaerial stretches of bar rier land with a fresh wa ter fauna in the north (4,880±40 14C BP). With the next ingression stage (i3), which took place be tween 4,500 and 3,000 BP, the bar rier shifted to its pres ent-day po si tion and the la goon changed into a fresh wa ter lake. From 3,000 to 1,700 14C BP fos sil soil and peats de vel oped on the bar rier sur face as a re sult of an other sea-level low er ing. The last ingression stages (i4 and i5), youn - ger than 1,700 BP, built up the bar rier, prac ti cally in its to day’s lo ca tion (sed i men tary com plexes M4 and M5). The youn gest sed i men tary com plex (M-6) is rep re sented by pres ent-day beach sands.
    Źródło:
    Studia Quaternaria; 2009, 26; 3-24
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The relationship between the chemical composition and lithology of Late Glacial and Holocene biogenic deposits of the Żabieniec mire (Central Poland)
    Autorzy:
    Okupny, Daniel
    Borówka, Ryszard Krzysztof
    Forysiak, Jacek
    Twardy, Juliusz
    Kloss, Marek
    Żurek, Sławomir
    Powiązania:
    https://bibliotekanauki.pl/articles/2058726.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    kettle hole
    limnogenic mire
    geochemistry
    macrofossils
    denudation
    Central Poland
    Opis:
    Geochemical and plant macrofossil analyses of the Żabieniec mire deposits and the palaeoenvironmental changes they record of the past several thousand years constitute an important source for palaeogeographical reconstruction of the Polish Lowland. We describe the phases of the basin’s development from the final part of the Plenivistulian (MIS2), through the Late Glacial and the entire Holocene, encompassing changes determined by both regional and global factors in the surrounding environment, and habitat transformations in the limnogenic mire. The kettle-hole infill of the Żabieniec mire is the only documented example in Central Poland of a succession of biogenic deposits exceeding 10 m in thickness in such a setting. Deposition initially took place in a lake environment, which led to a shallowing of the lake that persisted until the end of the Mesoholocene.
    Źródło:
    Geological Quarterly; 2021, 65, 1; 11
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemistry of a sedimentary section at the Wąwelnica archaeological site, Szczecin Hills (Western Pomerania)
    Autorzy:
    Okupny, Daniel
    Borówka, Ryszard K.
    Cedro, Bernard
    Sławińska, Joanna
    Tomkowiak, Julita
    Michczyński, Adam
    Kozłowska, Dorota
    Kowalski, Krzysztof
    Sedlik, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/1366052.pdf
    Data publikacji:
    2020-12-24
    Wydawca:
    Łódzkie Towarzystwo Naukowe
    Tematy:
    biogenic accumulation basins
    drainless areas
    geochemistry
    human impact
    Holocene
    Szczecin Hills
    Opis:
    The results of geochemical assays on biogenic sediments filling a fossil lacustrine basin at Wąwelnica, in the Szczecin Hills, within the left-bank part of the Oder River catchment are presented. The data reveal a natural Holocene sedimentation sequence similar to that found for other sites in central Europe. The geochemical record of palaeo-environmental changes, which may be a consequence of human activities in the proximity of the site, is distinctly bipartite. The part of the profile corresponding to the lacustrine sediment accumulation during the Greenlandian occasionally shows an increased mineral content and an elevated catchment erosion index. An incidental presence of Palaeolithic and Mesolithic communities is confirmed by archaeological evidence from a few sites in the Szczecin Hills. More distinct episodes of mineral matter supply and more pronounced changes in geochemical indicators can be inferred as occurring from the onset of the older part of the Atlantic until the Older Subboreal. Most of the flint artefacts discovered along with a collection of vessel fragments in the Mierzyn-Dołuje area are associated with the Neolithic occupation. However, changes in the deposits’ geochemistry do not reflect all the settlement stages associated with the consecutive human groups identified by archaeological evidence. Possible reasons include a low sediment accumulation rate having restricted peat mass accretion and prevented the storing of any higher amounts of water. This, along with the climate-change-caused lowering of the water table, could have periodically stopped the accumulation of autochthonous organic matter. In addition, intensified human activities coincided with periods of stable and low water level in the basin. On the other hand, breaks in human activity correspond with moist Holocene stages and local flooding events.
    Źródło:
    Acta Geographica Lodziensia; 2020, 110; 169-186
    0065-1249
    Pojawia się w:
    Acta Geographica Lodziensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Warunki paleoekologiczne subkopalnego koryta Kolonia Bechcice na tle hydrologii środkowego odcinka doliny Neru
    Palaeoecological and palaeohydrological patterns of the Kolonia Bechcice subfossil oxbow in the mid-Ner River valley
    Autorzy:
    Płóciennik, Mateusz
    Kittel, Piotr
    Borówka, Ryszard
    Cywa, Katarzyna
    Okupny, Daniel
    Obremska, Milena
    Pawłowski, Dominik
    Stachowicz-Rybka, Renata
    Szperna, Adam
    Witkowski, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/578329.pdf
    Data publikacji:
    2016
    Wydawca:
    Łódzkie Towarzystwo Naukowe
    Tematy:
    starorzecze
    rekonstrukcje paleośrodowiskowe
    paleoekologia
    dolina Neru
    Polska Środkowa
    palaeochannel
    palaeoenvironmental reconstruction
    palaeoecology
    Ner River valley
    Central Poland
    Opis:
    Ślady późnoglacjalnej i holoceńskiej historii doliny Neru są dobrze zachowane w osadach paleokoryta Kolonia Bechcice (NKB), które zostało odcięte w młodszym dryasie. Jego rozwój może być podzielony na pięć wyraźnych faz. Podczas młodszego dryasu NKB było dość głębokim, oligotroficznym jeziorem. Z nastaniem holocenu starorzecze uległo eutorfizacji i zarosło roślinnością wodną, a następnie szybko przekształciło się w torfowisko niskie. Brak jest w profi lu NKB osadów ze środkowego holocenu. Torfy z okresu borealnego przykryte są przez mułki i piaski pozakorytowe zdeponowane w okresie subatlantyckim. Zapis ewolucji paleokoryta Kolonia Bechcice dowodzi, że dolina Neru była dynamicznym środowiskiem w późnym glacjale i holocenie. Ekosystemy starorzecza podlegały znacznie silniej presji zmian klimatycznych niż jeziora i mokradła znajdujące się na wysoczyznach w regionie łódzkim.
    The history of the Ner River valley is well documented in Kolonia Bechcice (NKB) palaeochannel sediments. It was cut-off from the riverbed in the Younger Dryas. Its history may be divided into five distinct phases. During the Younger Dryas, the NKB was a relatively deep, oligotrophic water body. From the onset of the Holocene, the lake became a eutrophic, overgrown pond which quickly palludified and transformed into a rich fen with ferns and birches. There is a hiatus in the middle of the Holocene fen stratigraphy. A peat sequence is covered by fluvial silt and sand deposits. The NKB sequence documents the Ner valley as a dynamic system during the Late Glacial and the Holocene. Local ecosystems of this oxbow have remained under a much stronger pressure of climate changes than palaeolakes and wetlands located on uplands in the Łódź region.
    Źródło:
    Acta Geographica Lodziensia; 2016, 105; 107-124
    0065-1249
    Pojawia się w:
    Acta Geographica Lodziensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Glacial palaeoenvironmental changes in the southern part of the Holy Cross Mountains based on the “Białe Ługi” peatland record
    Autorzy:
    Okupny, Daniel
    Malkiewicz, Małgorzata
    Pawłowski, Dominik
    Ludwikowska-Kędzia, Małgorzata
    Borówka, Ryszard Krzysztof
    Forysiak, Jacek
    Michczyński, Adam
    Jucha, Witold
    Cybul, Piotr
    Żurek, Sławomir
    Powiązania:
    https://bibliotekanauki.pl/articles/2025128.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    biogenic deposits
    chronostratigraphy
    Małopolska Upland
    multiproxy analysis
    palaeoclimate
    Opis:
    This paper presents the Late Glacial stage of the development of the Białe Ługi peatland in the southern Holy Cross Mountains, based on a comprehensive palaeoenvironmental data. A complex analysis of palynology, Cladocera, sedimentology, geochemistry and 14C dating were used. Organic deposition was initiated during the Oldest Dryas. The sedimentary record of the aquatic and terrestrial ecosystems reflects considerable difference between cooler (Oldest, Older and Younger Dryas) and warmer phases (Bølling and Allerød). Periods of intensified interaction between aeolian processes and peatland are related to stages of disappearing vegetation and changes in aquatic invertebrate communities. We therefore suggest that peatlands were created as a result of local lithological-structural, tectonic, hydrogeological and morphological conditions, and the peatland development rate was largely influenced by changing climatic conditions, which determined local vegetation development, intensity of denudation processes and water level changes. The results validate significance of selection and use of several methods, as well as value of biogenic deposits from the Białe Ługi peatland as archives of past climate change in the Małopolska Upland. Relatively stable water conditions and uninterrupted biogenic sedimentation in the Late Glacial that were provided by the geological structure and relief suggest the studied peatland is a leading one in the region.
    Źródło:
    Studia Quaternaria; 2019, 36; 119-135
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Changes in habitat conditions in a Late Glacial fluviogenic lake in response to climatic fluctuations (Warta River valley, central Poland)
    Autorzy:
    Forysiak, Jacek
    Okupny, Daniel
    Obremska, Milena
    Antczak-Orlewska, Olga
    Płóciennik, Mateusz
    Pawłowski, Dominik
    Baradyn, Daria
    Kotrys, Bartosz
    Luoto, Tomi P.
    Nevalainen, Liisa
    Borówka, Ryszard K.
    Powiązania:
    https://bibliotekanauki.pl/articles/13955341.pdf
    Data publikacji:
    2023
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    multi-proxy analysis
    Late Weichselian
    denudation processes
    palaeoclimate
    central European river
    Opis:
    The Warta River valley was greatly influenced by the ice sheet of the Last Glacial Maximum (LGM). A small peatland located in the Warta drainage system is here used as a palaeoarchive of climatic and habitat changes during the Late Glacial (Weichselian). The Ługi sediment profile was investigated using multi-proxy (pollen, Chironomidae, Cladocera and geochemistry) analyses that recorded changes in a fluviogenic sedimentary depression. After the Poznań Phase (LGM), Ługi functioned as an oxbow lake that was cut off from the active river channel as a result of fluvial erosion. Since that time, the Warta River has flowed only along the section now occupied by the Jeziorsko Reservoir. Sedimentation of lacustrine deposits started at the beginning of the Late Glacial. Summer temperature reconstructions indicate cool Oldest and Younger Dryas, but no clear cooling in the Older Dryas. During the Younger Dryas the palaeolake was completely occupied by a peatland (fen), which periodically dried out during the Holocene. Investigation of this site has tracked the reaction of the habitat to climatic, hydrological and geomorphological changes throughout the Late Weichselian.
    Źródło:
    Geological Quarterly; 2023, 67, 1; art. no. 1
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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