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Wyszukujesz frazę "ice-sheet movement" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Warmińska prowincja paleogeograficzna plejstocenu (północno-wschodnia Polska)
    The Warmia Palaeogeographic Province of the Pleistocene (north–eastern Poland)
    Autorzy:
    Morawski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074336.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    plejstocen
    palaeografia
    stratygrafia
    glacitektonika
    morfolineament polodowcowy
    prowincja paleogeograficzna
    geofizyka
    Warmia
    Pleistocene
    palaeogeography
    stratigraphy
    glaciotectonic structures
    glacial morpholineaments
    ice-sheet movement
    geophysical methods
    NE Poland
    Opis:
    The historic area of Warmia (western part of NE Poland) can be considered as a separate geological unit. In particular it applies to its Pleistocene sedimentary complex with a very limited occurrence of morainic deposits, commonly forming discontinuous horizons. Intermorainic deposits predominate, including mainly ice-dam lake deposits which occur at different levels. The sub-Pleistocene relief variations reach up to 400 m, with glaciotectonic upthrustings of Neogene deposits extending to the topographic surface. The province area coincides with the Warmia ice-sheet lobe of the last glaciation (Main Stadial of the Vistulian Glaciation). The eastern boundary of the area is represented by an interlobe zone coincident with the western slope of the Mazury–Suwałki Anteclise. The boundary is a tectonic discontinuity zone extending down to the crystalline basement. The eastern, anteclise area was stable during the Pleistocene, while the area of Warmia (Peri-Baltic Syneclise) was unstable mainly due to cyclic ice-sheet loads which resulted in subsidence in the Warmia region. It, in turn, caused a bending of the ice sheet body, movement acceleration and a change in ice flow direction in Warmia. During interglacials, relaxation uplifting movements triggered stronger erosional processes. These movements were dependent on surface relief, stimulating the formation of deeply rooted glaciotectonic structures.
    Źródło:
    Przegląd Geologiczny; 2005, 53, 6; 477--488
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rekonstrukcja kierunków ruchu lodu w obrębie lobu górnej Odry
    Reconstruction of the ice-flow directions within the Upper Odra Lobe (S Poland)
    Autorzy:
    Salamon, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074907.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ice sheet lobe
    ice movement direction
    Upper Odra Lobe
    Odranian glaciation
    lob lądolodu
    kierunek ruchu lodu
    lob górnej Odry
    zlodowacenie Odry
    Opis:
    The Upper Odra Lobe - the southernmost part of the Scandinavian ice sheet during the Odranian (Drenthe) glaciation - was formed in the area of the Niemodlin Plain and the western part of the Racibórz Basin. It created a complex structure consisting of several sublobes: Odra, Nysa, Ruda and Klodnica sublobes. The study focused on the basal till deposited during ice sheet advance. Ice flow directions and the general pattern ofice mass distribution in the Upper Odra Lobe were defined based on the clast fabric. The resulting distribution of ice-flow palaeodirections suggest that the Upper Odra Lobe was formed by the mass of ice moving divergently from the Opole Plain located to the north of the Racibórz Basin. Ice-flow lines coincide with the pattern of major geomorphological units. The most intensive movement of the ice took place in the depression of the central part of the Silesian Lowland. From there, in the vicinity of the Niemodlin Plain, the ice sheet moved in different directions, forming smaller sublobes in several valleys. Strong relationship between the ice flow directions and morphology confirms the idea of a smaller ice sheet extent in the Racibórz Basin and Moravian Gate. Highly concentrated flow of ice in the back-lobe area, interpreted in this study, suggests that the lobe development resulted not only from the ice sheet adapting to the basement relief, but was also conditioned by a spatially varying distribution of ice, i.e. increased ice supply to the Niemodlin Plain and the western part ofthe Racibórz Basin.
    Źródło:
    Przegląd Geologiczny; 2012, 60, 10; 539--545
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reconstruction of ice sheet movement from the orientation of linearglacial landforms and glaciotectonic deformations near Kronowo (western Mazury, Poland)
    Autorzy:
    Morawski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2058830.pdf
    Data publikacji:
    2003
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Mazury
    Vistulian Glaciation
    ice sheet movement direction
    morpholineaments
    glaciotectonic
    Opis:
    Ice sheet movement in northeastern Poland is reconstructed from analysis of the spatial orientation of glacial landforms and glaciotectonic deformations. The orientations of both positive and negative glacial landforms (morpholineaments) of the Vistulian Glaciation were analysed. These landforms form 4 sets and follow an original crevasse system (joint net) within the ice sheet, probably resulting from horizontal stress exerted as the ice advanced from the north. Esker deposits have been glaciotectonically deformed to form a compressional fan fold, due to limited movement of the ice sheet prior to deglaciation. This movement caused the ice crevasses to be tightened and cut by strike-slip faults. Movement here was from the NNW, as determined from the orientation of deformations. Thus, the ice-flow direction changed at least by 10° during the last phase of the Vistulian Glaciation. If the ice rotated the northeastern portion of the esker, this change may have amounted to 30°.
    Źródło:
    Geological Quarterly; 2003, 47, 4; 339--356
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reconstruction of ice sheet movement from the orientation of glacial morpholineaments (crevasse landforms) : an example from northeastern Poland
    Autorzy:
    Morawski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059698.pdf
    Data publikacji:
    2005
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    NE Poland
    Pleistocene palaeogeography
    glacial morpholineaments
    crevasse landforms
    glacial crevasses
    ice flow direction
    Opis:
    Analysis of the orientation of both positive and negative glacial morpholineaments (crevasse landforms) was performed on the areas coveredby 12 selectedmap sheets of the Detailed Geological Map of Poland, scale 1:50 000, situated in NE Poland. Axes of these landforms formanet composed of four conjugate sets. This isaclassicaljointnet developeddue to horizontal stress, and composed of an orthogonal (extensional) system consisting of longitudinal and transversal sets, and a rhomboidal (shear) system consisting of two diagonal sets. Based on the orientation of glacial morpholineaments, inherited after the originaljoint net in the ice body, ice sheet advance directions - averaged for the area - were determined. This method of reconstructing ice flow direction creates new possibilities of making synthetic regional analyses, in particular in terms of Pleistocene palaeogeographic investigations. The best potential for the method’suse lies in areas of young post-glacial relief. In the region of NE Poland analyzed, these investigations enabled determination of different directions of ice flow within the Mazurian, Warmian and Vistulian ice sheet lobes of the last glaciation. Local changes in ice sheet movement directions were identified, and these reflected basement elevations (e.g. the Wiżajny Elevation). In other cases, basement irregularities influenced the opening of separate crevasse sets (e.g. outside of the Góra Dylewska massif) giving rise to a dominance of individual directions (sets) in the morpholineament orientation. This method can also be used in geological mapping.
    Źródło:
    Geological Quarterly; 2005, 49, 4; 403--416
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Postglacial morpholineaments as an indicator of ice sheet dynamics during the Saale Glaciation in the Białystok Plateau and Sokółka Hills (NE Poland)
    Autorzy:
    Rychel, J.
    Morawski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060371.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    morpholineament
    Saalian ice-sheet movement
    lobe
    NE Poland
    Opis:
    The palaeogeographical reconstruction of the deglaciation process in NE Poland during the Odranian Glaciation Wartanian Stadial (Saale MIS 6) is based mainly on the analysis of glacial morpholineaments, performed using the GIS programs that provide us with better understanding of the glacial landscape evolution, spatial reconstruction of glacial processes, and postglacial landscape development. Analysis of postglacial morpholineaments was carried out based on the Digital Elevation Model (DEM) as well as geological, geomorphological and topographic maps. It resulted in the delimitation of visible linear postglacial landforms, their identification and classification, and the determination of their genetic and chronological relations. Directions of the lineaments were determined through quantitative analysis. Qualitative analysis was applied to determine the spatial and temporal sequence of events, directions of ice movement and its range. Two glacial lobes, Biebrza and Neman, existed in the north-western part of the Białystok Plateau and Sokółka Hills during the last glacial advance. The lobed nature of the ice sheet can be confirmed by field data collected from, e.g., sites in Knyszewicze, and by topographic analysis of Quaternary sediments, combined with their thickness and genesis. The obtained reconstruction of the last glacial advance and retreat in the study area can be used in further regional discussions on the character and dynamics of the last glaciation in this region.
    Źródło:
    Geological Quarterly; 2017, 61, 2; 334--349
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Orientacja głazików jako wyraz ruchu lądolodów na przykładzie okolic Konina
    Orientation of pebbles expressing the movement of the ice-sheet found in the district of Konin
    Autorzy:
    Stankowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2096082.pdf
    Data publikacji:
    1975
    Wydawca:
    Poznańskie Towarzystwo Przyjaciół Nauk
    Źródło:
    Badania Fizjograficzne nad Polską Zachodnią. Seria A:Geografia Fizyczna; 1975, 28; 181-190
    0067-2807
    Pojawia się w:
    Badania Fizjograficzne nad Polską Zachodnią. Seria A:Geografia Fizyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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