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    Wyświetlanie 1-5 z 5
    Tytuł:
    Crevassing of an inland dune during the 1998 flood in upper Vistula river valley (South Poland
    Krewasowanie śródlądowej wydmy w dolinie górnej Wisły podczas powodzi w 1998 roku
    Autorzy:
    Gębica, P.
    Stachowicz-Rybka, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/191361.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    flood
    inland dune
    crevasse splay
    Vistula river valley
    Polska
    Opis:
    A relatively small flood in April 1998 inundated stream valleys draining the Tarnów Plateau. The flood water of one of these streams crevassed a dune. An elongated crevasse, an irregular-shaped transport zone and a crevasse splay were formed as a result. The crevasse splay consisted of several lobes, which were separated by crevasse channels. Minor fans formed at the channel outlets. All this forms were the result of rapid processes of erosion and accumulation. The dominant lithofacies in the crevasse splay sediments were fine and medium sand with horizontal (bottomset) and low-angle (topset) stratification. Trough and planar cross-stratified medium- and coarse-grained sands appear in the middle part of the vertical sequence. Most of these sediments were laid down in a high-energy environment of a sheet flow. The phase of vanishing flow left ripple marks, encountered in the highest part of the distal splay.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2002, 72, No 2; 191-197
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Osady rzeczne i roślinność interpleniglacjału zlodowacenia Wisły w dolinie Wisłoka między Rzeszowem a Lańcutem
    Alluvial deposits and vegetation of the Interpleniglacial period of the Vistulian Glaciation in the Wisłok River valley between Rzeszów and Łańcut (Sub-Carpathian Trough)
    Autorzy:
    Szczepanek, K.
    Kalinowicz, N.
    Gębica, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074524.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    osady aluwialne
    dolina Wisłoka
    analiza pyłkowa i głębokich skamieniałości
    zlodowacenie Wisły
    alluvial sediments
    Wisłok river valley
    pollen and macrofossil analyses
    Middle Plenivistulian (Interpleniglaciał)
    Opis:
    The paper presents the results of geomorphological studies and pollen analysis performed for alluvial deposits at 2 sites situated in the Wisłok River valley. The deposits consist of thin layers of organic muds filling palaeochannels or thermo-karst lakes of the Wisłok River, dated at the Interpleniglacial (Grudziądz Interstadial) of the Vistulian Glaciation. These deposits build the lower part of a sand terrace, 8-12 m high, and outliers of this terrace buried by overbank alluvial sediments within a floodplain. The samples for pollen analysis were taken from a natural undercut in the Wisłok River channel and from a sand pit dug to a greater depth. The pollen diagrams prove the existence of trees (forest-steppe) including primarily Pinus sylvestris, Betula t. alba, Pinus cembra and Larix. The diagrams do not show a clear tendency of a plant succession and thus of any distinct climate changes. The sedimentation took place under cool, boreal climate conditions. The occurrence of several layers of organic and sand deposits in the sections does not reflect rhythmic warm/cold climatic oscillations documented in the Interpleniglacial alluvial sequences in Western European rivers, but is a result of vertical channel fluctuations and facies changes.
    Źródło:
    Przegląd Geologiczny; 2007, 55, 7; 595-600
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uwarunkowania rozwoju pogrązów w aluwiach doliny Wisłoka w okolicach Rzeszowa (południowo-wschodnia Polska)
    Conditions for the development of load-cast structures in alluvial sedi- ments of the Wisłok River valley near Rzeszów (south-eastern Poland)
    Autorzy:
    Superson, J.
    Brzezińska-Wójcik, T.
    Gębica, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2075041.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    load-cast structures
    alluvial sediments
    Wislok river valley
    Weichselian glaciation
    south-eastern Poland
    pogrązowe struktury
    osady aluwialne
    dolina Wisłoka
    zlodowacenie Wisły
    południowo-wschodnia Polska
    Opis:
    The article presents the results of geological and geomorphological research concerning load-cast structures outcropping in the alluvial terrace sediments of theWisłok River in the Fore-Carpathian Erosional Valley. Given the large dimensions of these structures, reaching 1.5 m in some places, as well as their strong accumulation and diversity (i.e. drop-like and pocket-like structures), the authors attempted to establish the environmental factors that had determined the development of the structures in periglacial deposits of the Weichselian Glaciation. The structures were analysed in two accessible outcrops where sediments are represented by flood rhythmite and organic deposits, overlain by channel sands. Sandy load-cast structures occur in flood rhythmite and loamy deposits. The formation of load-cast structures probably started due to earthquakes in the Upper Pleniglacial period. The various shapes of load-cast structures were constrained by the various physical properties of the sediments and the escape of water during the deformation process.
    Źródło:
    Przegląd Geologiczny; 2013, 61, 2; 127--132
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentological interpretation of crevasse splays formed during the extreme 1997 flood in the upper Vistula river valley (South Poland)
    Sedymentologiczna interpretacja glifów krewasowych utworzonych w dolinie górnej Wisły podczas katastrofalnej powodzi w 1997 roku
    Autorzy:
    Gębica, P.
    Sokołowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/191180.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    modern river deposits
    crevasse splays
    Holocene
    Vistula valley
    southern Poland
    Opis:
    The paper describes scours and crevasse splays formed at the breaks in embankments of the upper Vistula river valley during the summer 1997 flood. The scours cut into the floodplain composed of fining upward channel and overbank deposits. Erosional furrows have developed locally around the scours. In their vicinity, a thin layer of channel-ag gravel was locally laid down. Variously shaped crevasse splays were formed: finger-like, deltoidal and tongue-like. Surface relief, vege-tation and buildings controlled their geometry and sedimentary features. The lower parts of the deposits consist of fine and medium sands with horizontal and low-angle stratification. Higher in the sequences medium and coarse sands with pebbles display planar cross-stratification. Mud balls and black oak trunks redeposited from older alluvia are common. The whole succession represents sheet-flow sediments with partly channelized flow. Locally, at the top, coarse sands, pebbles, mud balls and boulders embedded in silty-sandy matrix occur, representing slurry-flow deposits. Also present were sediments composed of alternating sands and mud pebbles. The vanishing flow phase is marked by occasional ripple marks encountered in the top part of the sequence. Around the flow obstacles (plants, buildings) sand shadows were formed, composed of fine and medium sands with horizontal stratification in the lower parts and ripple cross-lamination along with climbing cross-lamination in the upper parts. The top part included medium and coarse sands with planar cross-stratification. Most of the studied sequences showed coarse-upward grading which is not the effect of changes in the energy of flood waters but originates from the supply of all the time coarser material from the successively deepening scours.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2001, 71, No 1; 53-62
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geomorphological effects of the catastrophic drainage of artificial reservoir in the Młynówka valley at Górowo Iławeckie, Poland
    Autorzy:
    Brykała, D.
    Gierszewski, P.
    Gębica, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/294550.pdf
    Data publikacji:
    2003
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    flood, breaking of dam
    flood forms and deposits
    valley of the Młynówka Górowska river
    Opis:
    The problem concerns the catastrophic flood flow caused by the breaking of the dam of the artificial reservoir in the valley of the small river Młynówka Górowska. Extensive studies were focused on the section just below the broken dam, were the geomorphological effects of that event were most noticeable. A number of erosional and accumulative forms have been distinguished. The structure and grain size of the flood deposits have been studied. The occurrence of deposit sequences characteristic of slurry-flows has been found. The rapid fall of the flood wave was associated with the deposition of the coarser deposit fractions on the sides of the valley and of the finer ones on its floor.
    Źródło:
    Landform Analysis; 2003, 4; 75-82
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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