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    Wyświetlanie 1-6 z 6
    Tytuł:
    Budowa geologiczna form glacimarginalnych na Wyżynie Przedborskiej – przykładowe studia
    Geological structure of the glacimarginal forms of the Przedbórz Highland, selected samples
    Autorzy:
    Wachecka-Kotkowska, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2062131.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    analiza uziarnienia
    analiza strukturalna
    formy glacimarginalne
    zlodowacenia środkowopolskie
    Wyżyna Przedborska
    stadiał warty
    grain-size distribution
    structural analysis
    glaciomarginal landforms
    Warta Stage
    Middle Polish Glaciations
    Przedbórz Highland
    Opis:
    W artykule przedstawiono charakterystykę litologiczną osadów budujących wybrane formy glacimarginalne: morenę czołową akumulacyjną (stanowisko Masłowice), powierzchnię wysoczyzny morenowej falistej (stanowisko Ochotnik), przypuszczalną morenę martwego lodu (stanowisko Ludwików), kem (stanowisko Miejskie Pola). Formy pochodzą ze stadiału warty zlodowaceń środkowopolskich, są położone na północnych stokach ostańców mezozoicznych Wyżyny Przedborskiej. Wykonano analizy strukturalne, wybrane analizy teksturalne (uziarnienia i morfoskopowe) oraz oznaczono zawartości CaCO3 w osadach. Wykazano znaczący wpływ elewacji radomszczańskiej na przebieg i mieszany charakter deglacjacji. Wskazano, że formy glacimarginalne cechuje zróżnicowanie litofacjalne i litogenetyczne związane z dużą dynamiką deglacjacji lądolodu warty w brzeżnej części lobu Rawki, Pilicy i Luciąży.
    The article presents the lithological characteristics of sediments composing some marginal landforms: accumulated frontal moraine (Masłowice site), moraine plateau (Ochotnik site), alleged dead-ice moraine (Ludwików site) and kame (Miejskie Pola site). The landforms developed during the Warta Stage of the Middle Poland Glaciations and are located on the northern slopes of the remnant Mesozoic hills of the Przedbórz Highland. A structural and textural analysis (grain-size distribution and morphoscopy) was made and the CaCO3 content in the sediment was determined. A significant effect of the Radomsko elevation on the course and the mixed nature of the deglaciation has been proved. The marginal landforms are characterized by lithogical and lithofacies diversity related to the high dynamics of the Wartanian ice-sheet in its frontal part of the Rawka, Pilica and Luciąża Lobe.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2013, 454; 103--120
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Petrographical analysis of Warthian fluvioglacial gravels as a tool to trace the source area – a case study from central Poland
    Autorzy:
    Górska-Zabielska, M.
    Wachecka-Kotkowska, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/94704.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    gravel petrography
    indicator erratics
    fluvioglacial deposits
    Warthian stadial
    central Poland
    żwirowa petrografia
    eratyki przewodnie
    osady fluwioglacjalne
    centralna Polska
    Opis:
    The petrographical features of the medium- and coarse-grained gravels (4-10 mm and 20-60 mm, respectively) of weathered and fresh (unweathered) deposits indicate, in combination with so-called indicator and statistical erratics, that two glacial lobes joined in the borderland of the Polish Lowlands and Uplands. Lower Palaeozoic limestones become less frequent in the finer gravel fraction, whereas crystalline rocks and flints become more frequent. The petrographical analysis of the coarser gravel fraction indicates that the ice sheet advanced from the NE to NNW (the Widawka lobe) and from the NE to ENE (the Rawka, Pilica and Luciąża lobes). The source areas of the gravel deposited by the Warthian ice sheet were magmatic and sedimentary areas of both the Baltic and the SE Sweden basins.
    Źródło:
    Geologos; 2014, 20, 3; 183-199
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field trip in the semi-arid Gujarat Alluvial Plain : report
    Autorzy:
    Gębica, P.
    Wachecka-Kotkowska, L.
    Kotkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/294927.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    bajada
    piedmont fan
    Gujarat Alluvial Plain
    Narmada River
    India
    Gudźarat
    Narmada
    Indie
    Opis:
    This report contains short information about the geomorphological field trip in the Gujarat Alluvial Plain. During the field trip the issues of fluvial landform and alluvial deposits of the rivers were discussed: Sabarmathi River, Mahi River, Narmada River and Karjan River. Particular attention was paid to the relief and geological structure of the Gujarat Alluvial Plain, dissected by the valleys of several rivers. The role of tectonics, sea level fluctuations and climate changes and their influence on the course of fluvial, aeolian and sea accumulation in the lower sections of river valleys was emphasized.
    Źródło:
    Landform Analysis; 2017, 35; 17-20
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Middle Weichselian Pleniglacial sedimentation in the Krasówka river palaeovalley, central Poland
    Autorzy:
    Wachecka-Kotkowska, L.
    Krzyszkowski, D.
    Klaczak, K.
    Król, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/191210.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    alluvial deposits
    MIS 3
    sedimentary petrology
    AMS
    palynology
    radiocarbon dates
    Bełchatów mine
    Opis:
    This study from the Szczerców field of the Bełchatów open-cast mining complex, central Poland, reveals the local geomorphic and stratigraphic history of the Krasówka river palaeovalley – a major western tributary of the river Widawka. The data are from the western flank of the N-trending palaeovalley and the study combines detailed lithofacies analysis of outcrop sections, sediment petrology, AMS measurements and palynological evidence. Radiocarbon dates are of crucial importance for the reconstruction of the palaeovalley history. The study contributes to a better understanding of the response of the Central European river systems to the Vistulian Pleniglacial conditions. The Vistulian Pleniglacial sedimentation in the study area commenced with the accumulation of the latest Eemian to earliest Weichselian (≥45 ka) deposits by sheetwash processes in a local karstic topographic depression. The Krasówka river then formed to the east and shifted farther eastwards, but later approached twice the study area with a net aggradation prior to 43 ka BP – flooding it with overbank deposits. The river subsequently incised by nearly 20 m around 40 ka BP and began to fill in its valley by aggradation around 35 ka BP, while migrating eastwards and markedly decreasing its flooding capacity from 33 to 24 ka BP. The fluvial system was rejuvenated around 21 ka BP, with some initial erosion, and kept filling its valley by aggradation while flooding the valley flank. The river after filling its valley continued to aggrade, but gradually ran out of vertical accommodation and migrated westwards. The fluvial activity at this stage was increasingly accompanied by aeolian sedimentation. Once the Mid-Weichselian Pleniglacial came to an end around 14.5 ka BP, the Krasówka river had re-incised by nearly 5 m and assumed its present-day altitude in response to the post-glacial regional isostatic rebound of crustal basement.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2014, 84, 4; 323-340
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plant macrofossils from the Czyżów Complex deposits of the Szczerców outcrop, central Poland
    Autorzy:
    Myśkow, E.
    Krzyszkowski, D.
    Wachecka-Kotkowska, L.
    Wieczorek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/184237.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    fluvial sediments
    plant macrofossils
    Holsteinian
    Czyżów Complex
    Central Poland
    Opis:
    The paper presents the results of research into the plant macrofossils found in the tectonic Kleszczów Graben, within Mesopleistocene sandy sediments. A number of samples were collected at eight locations from river sediments containing variously sized fragments of plants, mostly from greenish sands overlying Neogene sediments. The structural characteristics of the sediments show a cyclic record of the formation of point bars, their washing out at supercritical conditions, and their aggradation by fine-grained material during flow waning. Based on lithological and structural studies, it has been demonstrated that the sands accumulated in an environment of a meandering river, whose valley bottom was covered with fairly dense vegetation, inhibiting the influx of mineral material to the floodplain from the surroundings – the valley or glacial plateau slopes. The aim of further analysis was to identify the plant genera of the individual macrofossils (about 40 specimens). The most numerous macrofossils were observed in the middle layers of the profile, within sandy megaripple structures, where mostly fragments of Fraxinus and Acer wood were present. In other layers, several fragments of Pinus and three pieces of Populus wood were identified. Additionally, young stems of dicotyledonous plants and fragments of rhytidome (the outer bark of a tree) were found. The results are discussed in combination with considerations on the deposition of the Czyżów Complex in the Bełchatów outcrop, and on the occurrence of local flora.
    Źródło:
    Geology, Geophysics and Environment; 2016, 42, 3; 325-336
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The results of new studies of Quaternary sediments in the Kleszczów Graben, Szczerców Outcrop, Bełchatów Lignite Opencast Mine
    Autorzy:
    Wieczorek, D.
    Stoiński, A.
    Krzyszkowski, D.
    Wachecka-Kotkowska, L.
    Krzymińska, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/295132.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    Quaternary
    stratigraphy
    Kleszczów Graben
    Szczerców Outcrop
    Central Poland
    Opis:
    The paper presents the results of new studies of Quaternary deposits filling the Kleszczów Graben in the Szczerców outcrop, Bełchatów Lignite Opencast Mine. Sedimentary successions were profiled in the fieldwork. Moreover, the borehole data were studied. Laboratory studies included: grain size analyses, analyses of shape and morphology of quartz grain (morphoscopy), analyses of anisotropy of magnetic susceptibility (AMS), palynological, malacological and ostracodological studies, as well as geochronometric (C14) and geochemical (δ18O/δ16O) measurements. The studies were carried out in 2009–2013 and resulted in discovering of some sedimentary formations as well as arranging geological cross-sections and synthetic lithostratigraphic profile. The following sedimantary formations have been distinguished: Folwark, Kuców, Czyżów, Ławki, Rogowiec, Aleksandrów, Piaski and Widawka, arranged into two structural units: the lower one – deformed, and the upper one – undeformed.
    Źródło:
    Landform Analysis; 2015, 29; 63-71
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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