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Wyświetlanie 1-3 z 3
Tytuł:
Paleogene-Neogene tectonic evolution of the lignite-rich Szamotuły Graben
Autorzy:
Widera, Marek
Stawikowski, Wojciech
Uścinowicz, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/138663.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Palaeozoic Platform
Polish Basin
salt diapirism
synsedimentary tectonics
lignite compaction
platforma paleozoiczna
basen polski
diapiryzm solny
wysad solny
tektonika synsedymentacyjna
zagęszczanie węgla brunatnego
Opis:
The Szamotuły Graben covers the southernmost part of the Permo-Mesozoic Poznań–Szamotuły Fault Zone. Along this regional discontinuity there are several salt structures, including the Szamotuły diapir, over which an extensional graben formed in the Paleogene and Neogene. The graben is located north of Poznań in central-western Poland, and is NW–SE-trending, ~20 km long, 3–5.5 km wide, and up to 160 m deep. It is filled with Lower Oligocene and Neogene sediments, including relatively thick lignite seams. Data from boreholes allow the assignment of the graben-fill sediments to appropriate lithostratigraphic units. Furthermore, analysis of changes in the thickness of these units provides evidence for periods of accelerated graben subsidence or uplift relative to its flanks. As a result, two distinct stages of tectonic subsidence and one inversion in the Paleogene–Neogene evolution of the Szamotuły Graben have been distinguished. Thus, relatively significant subsidence occurred in the Early Oligocene and the middle Early–earliest Mid-Miocene, while slight inversion took place in the middle part of the Mid-Miocene.
Źródło:
Acta Geologica Polonica; 2019, 69, 3; 387-401
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geohazard assessment of the coastal zone : the case of the southern Baltic Sea
Autorzy:
Uścinowicz, Grzegorz
Szarafin, Tomasz
Pączek, Urszula
Lidzbarski, Mirosław
Tarnawska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/2058861.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
coastal measurements
northern Poland
land-sea interaction
Opis:
Research by the Polish Geological Survey has been carried out along the southern Baltic coastal zone over a distance of 38 km. The Baltic Sea is classified as non-tidal, and its southern coasts are built entirely of weakly lithified sedimentary rocks. These deposits form three main types of coast, namely cliffs, barriers and alluvial coasts (wetlands), with the research focusing on the first two. Methods including remote sensing, mapping (geological, hydrogeological), offshore survey (bathymetric and geophysical measurements), laboratory analyses and modelling revealed a number of natural hazards. These are, respectively: (1) permanently occurring hazards, causing material damage such as: landslides, coastal erosion and seabed erosion; (2) incidental hazards such as dune breakage and storm surge overflow and (3) hypothetical threats that may occur in the future, such as hydrogeohazards defined here as flooding resulting from groundwater level rise or more rarely, earthquake threats.
Źródło:
Geological Quarterly; 2021, 65, 1; 5
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chronology of the last ice sheet decay on the southern Baltic area based on dating of glaciofluvial and ice-dammed lake deposits
Autorzy:
Uścinowicz, Szymon
Adamiec, Grzegorz
Bluszcz, Andrzej
Jegliński, Wojciech
Jurys, Leszek
Miotk-Szpiganowicz, Grażyna
Moska, Piotr
Pączek, Urszula
Piotrowska, Natalia
Poręba, Grzegorz
Przezdziecki, Piotr
Uścinowicz, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2058614.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
southern Baltic area
deglaciation
Late Glacial
Słupsk Bank Phase
OSL dating
Opis:
The paper presents the results of the first OSL dating of glaciofluvial and ice-marginal lake sediments which occur between end moraines of the Słupsk Bank and the Polish coast. The sand and gravel of glaciofluvial deltas on the Słupsk Bank were deposited most likely during a period from 14.3 ±1.2 to 16.6 ±1.4 ka ago. The deposition of silty-sandy sediments of the ice-marginal lake is dated at 14.51 ±0.81 and 14.6 ±1.4 ka years. Likewise, dates ranging from 13.74 ±0.84 to 16.70 ±1.1 ka obtained from low sandy ridges, related to the southern range of the ice-marginal lake in the Gardno-Łeba Lowland, indicate the most likely timing of their deposition. It can be concluded that a short stop of the ice sheet on the Słupsk Bank took place approximately 15.2 ka ago, which could be correlated with the position of the ice sheet front in central Skåne and in northern Lithuania at that time. Older and younger results were also obtained, except the dates mentioned above. The older ages show little sunlight exposure of sediments during their deposition. The younger dates indicate a marine origin of the sediments and show that some parts of glaciofluvial sediments were redeposited and exposed to sunlight at a later stage, most probably when dead-ice blocks were melting.
Źródło:
Geological Quarterly; 2019, 63, 1; 193--208
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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