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    Wyświetlanie 1-9 z 9
    Tytuł:
    Fluwialna geneza ogniwa wielkopolskiego na podstawie danych z obszaru środkowej Polski
    Fluvial origin the Wielkopolska member based on data from the central Poland
    Autorzy:
    Widera, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/170153.pdf
    Data publikacji:
    2012
    Wydawca:
    Poltegor-Instytut Instytut Górnictwa Odkrywkowego
    Tematy:
    neogen
    osady fluwialne
    geneza
    Neogene
    fluvial sediments
    origin
    Opis:
    Osady drobnoklastyczne zalegające w stropie neogenu na Niżu Polskim nie mają wyjaśnionej genezy. Osady te są bardzo ważną kopaliną, często towarzyszącą wydobyciu węgla brunatnego. Wśród badaczy istnieją różne hipotezy na temat ich powstania, często wzajemnie wykluczające się, tj. jeziorna, morska i rzeczna, albo ich kombinacje. Na podstawie danych otworowych z okolic Poznania oraz obserwacji ścian odkrywek w KWB Konin dostarczono dowodów potwierdzających rzeczne pochodzenie osadów ogniwa wielkopolskiego. Ponadto wskazano na anastomozujący typ rzek, które doprowadziły do powstania izolowanych litosomów piaszczystych w otoczeniu osadów iłowo-mułowych.
    Fine-grained sediments rested at the top of Neogene in the Polish Lowlands until now have not explained the origin. Be-cause they are very important minerals, often accompanied by lignite mining, certainly require further research. Among resear-chers, there are various hypotheses about their origin, often mutually exclusive, i.e. a lake, sea and evidence of the fluvial origin of the Wielkopolska. Member has been provided. Additionally, it has been indicated the anastomosing type of rivers that led to the of solated sandy bodies, which are surrounded by clayey-silty sediments.
    Źródło:
    Górnictwo Odkrywkowe; 2012, 53, 1-2; 109-118
    0043-2075
    Pojawia się w:
    Górnictwo Odkrywkowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper Pleistocene and Holocene deposits at Starunia palaeontological site and vicinity (Carpathian region, Ukraine)
    Autorzy:
    Sokołowski, T.
    Stachowicz-Rybka, R.
    Woronko, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/191556.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Quaternary fluvial sediments
    Velyky Lukavets River valley
    Starunia
    Carpathian region
    Ukraine
    Opis:
    An abandoned ozokerite mine (= Ropyshche), where large mammal remains were discovered in the first half of the 20th century, is located in the Velyky Lukavets River valley covered with Quaternary sediments. The catchment area includes a flysch sequence unconformably overlain by salt-bearing Lower Miocene molasses of the Vorotyshcha beds. Both the Upper Pleistocene and Holocene are represented by: channel (gravel, sandy gravel) and overbank alluvium (mud, peat, biogenic mud) and colluvium (mud, sandy mud) as well as by mine wastes. The channel sediments are usually found in the lowest fragments of the borehole logs and represent mainly material deposited in the straight segments of meandering river-beds. The most common, fine-grained (Mz = 61.33 to 7.11 ?m), distal floodplain sediments are locally up to 10 m thick and are dominated by massive mud lithofacies, which contain frequent burrows, root hairs or slightly larger root traces and reed rods. These sediments are characterized by rather stable grain size distribution, quite monotonous mineral composition, presence of resistant heavy minerals and quartz grains with traces of chemical weathering. Angular grains with conchoidal fractures and sharp edges also occur. Therefore, textural features show that the main sources of material were, most probably, weathering crusts of various ages developed on relatively poorly lithologically diversified Carpathian flysch strata and on Miocene deposits of the Carpathian Foredeep. With time, an increase of the content of material originating from mechanical weathering (frost action) occurred in the floodplain deposits, which can be linked to an increase of climate severity and reduction of vegetation. However, these changes are not recorded in the deposits, which developed mostly in closed hollows and accumulated mainly from suspension or from low-energy flows. This calm sedimentation was periodically interrupted by supply of more coarse-grained material (sand, gravel). A distinct predominance of overbank deposits in the sections documented by their thickness suggests that the northward flow of the Velyky Lukavets River was blocked as a result of either neotectonic movements or damming of the valley by landslide tongues. From the lithological point of view, the most favourable conditions for preservation of large, extinct mammals still exist in the two selected areas, where the total thickness of Pleistocene muds exceeds 2 metres. The first area is located in the vicinity of boreholes Nos 2, 3, 21, 22, 23, 28, 30 33 and 36N, and the other, smaller one, is placed around borehole No. 42.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2009, 79, No 3; 255-278
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Natural and anthropogenic indicators of fluvial system changes, the Bobrza Valley (Holy Cross Mts) as an example
    Autorzy:
    Rutkiewicz, P.
    Gawior, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/100816.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Śląski. Wydział Nauk o Ziemi
    Tematy:
    meandering river
    fluvial relief
    sediments
    human impact
    Juncus subnodulosus
    rzeka meandrująca
    osad rzeczny
    wpływ człowieka
    Bobrza
    Opis:
    Transformations of a fluvial system are caused both by natural factors and human pressure. These factors model the system independently at different times and with different intensities or they affect it simultaneously. The aim of this study is to identify the transformation of the Bobrza river valley system occurring under natural conditions and that occurring under the influence of human activity. The identification was based on specific indicators The study was conducted in the valley mouth of the Bobrza River (Holy Cross Mountains), where three research sites were located. The investigation concerned the relief of the valley and the mineral and organic deposits. A wide range of research methods were used during the study e.g. analysis of LiDAR data, macronutrient analysis, and radioactive dating. The analyses enabled the natural and anthropogenic transformations of the Bobrza river system to be distinguished using the following indicators: morphometric and sedimentological characteristics of the palaeomeander (natural transformation), the sequence of mineral and organic deposits in exposures on the contemporary floodplain (natural and anthropogenic transformation) and transformation associated with the operation of a water mill (anthropogenic transformation). In addition, it is worth mentioning that the Bobrza channel is the location which has provided the only fossils of Juncus subnodulosus in south-east Poland.
    Źródło:
    Contemporary Trends in Geoscience; 2016, 5, 1; 46-60
    2299-8179
    Pojawia się w:
    Contemporary Trends in Geoscience
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Pleistocene evolution of hydrographical network recorded at geosites in the Middle Neman area (western Belarus)
    Autorzy:
    Pavlovskaya, I. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1204969.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    geostanowiska
    obszar środkowego Niemna
    osady rzeczne
    osady jeziorne
    późny plejstocen
    geosites
    Middle Neman area
    fluvial sediments
    lake deposits
    Late Pleistocene
    Opis:
    Geostanowiska położone w białoruskiej części środkowego Niemna zawierają obszerną informację o środowiskach sedymentacyjnych oraz rozwoju sieci hydrograficznej w obrębie zlewni Niemna - jednej z wielkich rzek Europy centralnej. Badania sukcesji sedymentacyjnych w stanowiskach z jednoznaczną pozycją stratygraficzną ujawniły główne cechy środowisk sedymentacyjnych późnego plejstocenu. Rozprzestrzenienie osadów pochodzenia jeziornego z okresu interglacjału murawińskiego (emskiego) oraz brak równowiekowych osadów rzecznych dowodzi, że na miejscu współczesnej doliny Niemna w okresie ostatniego interglacjału plejstocenu nie istniała żadna duża arteria wodna. Sedymentacja zbiornikowa przeważała w rejonie środkowego Niemna od początku interglacjału murawińskiego (sedymentacja jeziorna), w okresie zlodowacenia pojezierskiego (sedymentacja zastoiskowa) do okresu późnego glacjału. Współczesny kierunek przepływu Niemna został ukszałtowany w czasie końcowych faz ostatniego zlodowacenia i w późnym glacjale.
    Źródło:
    Polish Geological Institute Special Papers; 2004, 13; 167-174
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    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:
    Quaternary valley levels and river terraces in the western part of the Holy Cross Mountains
    Autorzy:
    Dzierżek, Jan
    Lindner, Leszek
    Cabalski, Krzysztof
    Powiązania:
    https://bibliotekanauki.pl/articles/2025214.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Holy Cross Mountains
    Quaternary
    palaeogeography
    valley sediments
    fluvial forms
    Opis:
    According to the current state of research five sand-gravel accumulation levels of Quaternary age are visible in the morphology of the western part of the Holy Cross Mountains, within the Wierna Rzeka, Hutka and Bobrza river valley systems and the lower stretches of the Biała Nida and Czarna Nida river valleys. Two upper levels (V and IV) correspond to valleys formed during the Odranian Glaciation-Saalian, MIS6 and its reccesional phases under the influence of proglacial and extraglacial waters beyond the extent (to the east) of the maximal ice-sheet limit of this glaciation, reaching to the present-day Leśnica-Gnieździska-Łopuszno line. Two lower levels (III and II) are terraces that were typically formed during the climatic conditions thatprevailed during Vistulian stadials. Sands and gravels of the three upper levels (V−III) contain numerous debris flow deposits and cryoturbation structures documenting periglacial conditions during their accumulation. The lowermost level (I) is a typical Holocene floodplain.
    Źródło:
    Studia Quaternaria; 2019, 36; 109-118
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wykorzystanie metali ciężkich w określaniu wieku osadów
    The use of heavy metals in estimation of the age of deposits
    Autorzy:
    Ciszewski, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/295082.pdf
    Data publikacji:
    2010
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    osady rzeczne
    procesy fluwialne
    metale ciężkie
    wiek osadów
    river sediments
    fluvial processes
    heavy metals
    age of sediments
    Opis:
    Od początku lat 80. XX w. zróżnicowanie koncentracji metali ciężkich zaczęto wykorzystywać do oceny wieku głównie osadów fluwialnych. Charakterystyczne piki, spadki lub wzrosty tych koncentracji na wykresach porównuje się z archiwalnymi danymi o charakterystycznych zmianach produkcji lub emisji metali na obszarze zlewni. Metoda daje najdokładniejsze wyniki przy istnieniu 1-2 dużych źródeł ścieków na obszarze zlewni i wyraźnych zmianach wielkości ich zrzutów. Zazwyczaj wykonuje się kilka profili w osadach pozakorytowych, analizując zawartość metali we frakcji drobnoziarnistej. Ograniczenia w jej stosowaniu wynikają z dokładności istniejących zapisów historii gospodarczej zlewni oraz postdepozycyjnej migracji metali istotnej szczególnie w poziomach położonych poniżej zwierciadła wody.
    The changes in heavy metal concentrations are used for estimation of the age of fluvial sediments since the recent decades of 20th century. Characteristic peaks, sudden drops or increases of metal concentrations in vertical profiles of overbank sediments are usually compared with archival data of metal production or emission in the drainage basin. Method gives the best results with 1-2 large pollution sources in a drainage basin with marked changes in quality and quantity of discharged effluents. Usually several or more profiles are performed and metal content is analyzed in fine sediment fraction. The method is usually limited by accuracy and availability of archival data from industrial history of a drainage basin and by postdepositional mobilization of heavy metals which could be significant below average groundwater level.
    Źródło:
    Landform Analysis; 2010, 12; 31-34
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeogeography of the western Sandomierz Basin in Late Neogene and Early Quaternary times (Carpathian Foredeep, South Poland)
    Autorzy:
    Brud, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/191643.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Neogene
    Quaternary
    Early Pleistocene
    sub-Quaternary surface
    coarse-clastic fluvial sediments
    sub-Carpathian Furrow
    Sandomierz Basin
    Carpathian Foredeep
    Opis:
    The sub-Quaternary topography of the western Sandomierz Basin has been compared to variable thicknesses of Quaternary sediments and geomorphology of the area. The lithology and age of the top of Miocene strata have been determined. The Witów Series has been interpreted as a sequence of a braided river that used to flow into the retreating marine basin, forming a fan delta whose age, according to macrofloristic determinations, has been assigned to the Late Miocene. Lower Quaternary gravels cap the remnants of a planated surface situated at 240-250 m a.s.l. The Błonie gravel horizon occurring at a similar altitude was deposited by a river active in Narevian and/or Nidanian glacial stages, and its top underwent reworking during the Sanian-2 stage. Deposits infilling the fossil sub-Carpathian Furrow have been mapped and dated to the Cromerian s.l. interglacial stage. The final alluviation of this segment of the furrow took place during the Sanian-2 stage. Reconstruction of the drainage pattern during the Eopleistocene, South-Polish glaciations, and Masovian inter- glacial stage has been proposed as well.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2004, 74, No 1; 63-93
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of the Late Neogene and Eopleistocene fluvial system in the foreland of the Sudetes Mountains, SW Poland
    Autorzy:
    Badura, J.
    Przybylski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/973652.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    fluvial sediments
    Neogene
    Eopleistocene
    Lower Silesia
    SW Poland
    palaeogeography
    Opis:
    The oldest Cainozoic fluvial deposits in Lower Silesia date from the Oligocene. During the Middle and Late Miocene times, the fluvial system of this region was only slightly modified, especially in the foreland of the West and Middle Sudetes Mts. River lengths changed, following the migration of the North Sea shorelines. A rapid rebuilding of the fluvial system took place in the foreland of the East Sudetes Mts. either in the Late or Middle Miocene. Till that time, the main river valley of this region - the Nysa Kłodzka River, related to the Paczków and Kędzierzyn Grabens - used to flow towards the East, to a bay of the Paratethys sea. The new main river, pre-Odra, started to flow towards the North not before the Grodków Graben cut meridionally the Meta-Carpathian Swell. We are of the opinion that deposits of the Poznań Formation originated in an fluvial environment because no marine and/or limnic deposits have hitherto been discovered in the area of Lower Silesia above the uppermost of the Middle-Polish lignite seams (Henryk). The pre-Odra River drained the eastern part of Lower Silesia, and flowed towards the North, at least to the Poznań region. This main river captured such smaller rivers, as: the pre-Vistula, pre-Olza, pre-Ostravica, pre-Opava, pre-Nysa Kłodzka, and pre-Bystrzyca. Rivers draining the West Sudetes Mts. flowed first towards the North, to the region of the present-day Middle Odra River, and there turned to the West. It is conceivable that these rivers curved westwards just along the line of the present-day Wrocław - Magdeburg marginal stream valley ("Pradolina"). Since the Pliocene, the Sudetic rivers have started to transport coarser, sandy, and even gravelly material to a more distant foreland. Alluvial deposits of this phase occur exclusively on uplands. Coarse-grained sediments recognized in the bottom of deep erosional incisions were redeposited under subglacial conditions during the Mesopleistocene glaciations. The presented new interpretation of origin of the Poznań Formation basin and detailed recognition of Pliocene and Eopleistocene river system should initiate a new line of research into the Late Neogene and Eopleistocene sediments.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2004, 74, No 1; 43-61
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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