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    Wyświetlanie 1-3 z 3
    Tytuł:
    The Young Baltic advance in the western Baltic depression
    Autorzy:
    Stephan, H. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059318.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Palaeo-ice stream
    Baltic Depression
    Weichselian
    till facies
    ice flow
    Opis:
    The last Weichselian glacial advance into the western Baltic depression, the so-called "Young Baltic" glacier advance is described. In the southern Baltic depression, ice masses flowed westwards and fanned out in the western Baltic region where they terminated along the end moraines of the East Jutland advance (Denmark), Sehberg advance (Schleswig-Holstein) and Mecklenburg advance (Mecklenburg-Vorpommern). The westward ice advance is likely due to the rapid melting of Norwegian and Swedish ice masses which had previously blocked the more easterly ice masses from draining to the west and north-west. The deposition of a purely eastern-sourced debris facies by a Baltic ice stream in the far west might be the result of ice/bed separation during flow.
    Źródło:
    Geological Quarterly; 2001, 45, 4; 359-364
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reconstruction of the Vistula ice stream during the Last Glacial Maximum in Poland
    Autorzy:
    Morawski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059221.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    N Poland
    Vistula valley
    Pleistocene
    ice stream
    glacial morpholineaments
    Opis:
    The variability ofice movement directions within the Vistula lobe of the Main Stadial ice sheet of the last glaciation is analysed. Reconstruction of the ice movement directions is made based on analysis of the orientation of glacial morpholineaments. Linear glacial land forms are analysed on the basis of data from 26 map sheets of the Detailed Geo logical Map of Poland (DGMP), scale 1:50 000, compiled earlier by various au thors. The morpholineaments were investigated in a belt of morainic plateau that adjoins the Vistula valley on both sides. The analysis revealed that the last glaciation ice sheet advanced directly from the north within the broadly un der stood Vistula ice lobe zone, and that the ice flow direction was constant. However, within a narrow belt of the pre-Vistula River valley that was formed in the Eemian Interglacial, the 30–50 km wide ice stream was characterized by locally variable ice flow directions consistent with the pre-existing valley trend. Changes in ice flow direction are recorded in the locally variable orientation of lin ear glacial landforms, indicating that the ice stream was active until the deglaciation period when the pres ent-day shapes of the glacial landforms developed.
    Źródło:
    Geological Quarterly; 2009, 53, 3; 305-316
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Streamlined topographical features in and around the Gulf of Riga as evidence of Late Weichselian glacial dynamics
    Autorzy:
    Tsyrulnikov, A.
    Tuuling, I.
    Hang, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060206.pdf
    Data publikacji:
    2008
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Gulf of Riga
    Baltic Sea
    Late Weichselian glaciation
    Riga ice stream
    glacial topography
    bottom relief
    Opis:
    Based on various cartographic sources, a digital terrain model and acoustic profiling data, linear relief features of glacial origin have been distin guished and analysed in the Gulf of Riga and adjacent mainland areas in order to reconstruct the dynamics and pathways of former ice streams. North-east–south-west oriented features in the till topography prevail in the central part of the gulf and along the southern coast of the island of Saaremaa, which corroborate the previously known south/south-east di rection of the main Riga ice stream. North-east to south-west directed features dominate in the Pärnu Bay and around the Irbe Strait. Similar deviations from the Riga ice stream are most likely due to ice divide zones, namely the Sakala Upland in Southern Estonia and Kurzeme in north western Latvia, which locally changed the course of the main ice flow. The influence of the Kurzeme ice divide is traceable at the bottom of the gulf up to the southern coast of Saaremaa. There is no evidence of an ice-marginal zone cross ing the central part of the Gulf of Riga as was supposed earlier. The Pandivere-Neva and Palivere ice-marginal zones, which merge on the Sorve Peninsula, probably continue offshore into the Irbe Strait. As the age of the glacier relieffeatures is poorly contained, the chronologi reconstruction of the ice dynamics is tentative.
    Źródło:
    Geological Quarterly; 2008, 52, 1; 81-81
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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