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    Wyświetlanie 1-3 z 3
    Tytuł:
    Early Paleogene planktic foraminifera in thin-sections : an experiment on isolated specimens from the Fore-Magura Thrust Sheet (Polish Outer Carpathians)
    Autorzy:
    Baliniak, W.
    Malata, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060605.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Paleocene-Middle Eocene planktic foraminifera
    random thin-sections
    experiment
    isolated specimens
    Fore-Magura Thrust Sheet
    Opis:
    This paper describes results of an experiment aimed mainly at obtaining random thin-sections of isolated specimens of planktic foraminifera determined to a species level. Twenty species of uppermost Paleocene-Middle Eocene planktic foraminifera from pelagic variegated marls of the Fore-Magura Thrust Sheet have been chosen for this experiment. These planktic foraminifera belong to the genera Chiloguembelina, Turborotalia, Acarinina, Morozovella, Muricoglobigerina, Subbotina and Parasubbotina. Their SEM images, stereomicroscope photos of isolated specimens, and the experimental thin-sections along with their systematics and stratigraphic ranges are presented.
    Źródło:
    Geological Quarterly; 2017, 61, 3; 655--681
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentary conditions in the Siary zone of the Magura basin (Carpathians) in the late Eocene-early Oligocene
    Warunki sedymentacji w strefie Siar basenu magurskiego (Karpaty) w późnym eocenie-wczesnym oligocenie
    Autorzy:
    Leszczyński, S.
    Malata, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205216.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    flysch
    Carpathians
    Magura thrust
    Siary zone
    Priabonian
    Rupelian
    sedimentation
    Opis:
    The sediments of the upper Eocene (Priabonian)-lower Oligocene (Rupelian) of the Siary zone in the Magura nappe (basically Magura Beds in glauconitic facies) display features indicating their origination in sedimentary conditions quite different from those in which coeval sediments from the other parts of the Carpathians were deposited. This paper aims at interpreting the sedimentary conditions on the basis of lithofacies, their vertical and lateral distribution, foraminifera assemblages, CaCO3 and organic matter content determined in six transects through the entire Siary zone, the contents of main and trace elements determined in 11 samples from one section and different published data. Lithofacies and the present day shape of the Siary zone suggest sedimentation of the entire succession in a strongly elongated confined basin. Facies distribution indicates deposition on a submarine ramp that gradually expanded to NE and E along the slopes of the outer basin margin. Assemblages of foraminifera suggest location of the basin bottom below the foraminiferal lysocline. Moreover, foraminifera together with bioturbation structures and sediment geochemistry indicate sedimentation mainly in weakly oxic, close to dysoxic bottom waters. The differences in facies in relation to the coeval deposits of the other parts of the Carpathians are interpreted as resulting mainly from intense resedimentation in the Siary zone during the Priabonian-Rupelian, and in part from the relatively low calcium carbonate supply. Gradual expansion of resedimentation towards NE, followed by a decrease in the supply of coarse-grained material is regarded as due to lithosphere rollback beneath the evolving Carpathians. This process is interpreted as of superior significance in controlling se--Rupelian not only in the Siary zone but also in the entire Magura basin. This was the factor responsible for forcing the subsidence of the Magura basin, accretionary wedge development in its inner part, and fore-bulging of the area at some distance in front of the zone of the rolling back lithosphere, i.e. in the source area of the sedimentary succession in question. Finally, this process also caused drowning and burying of the source area.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2002, 72, No 3; 201-239
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Topography of the Magura floor thrust and morphotectonics of the Outer West Carpathians in Poland
    Autorzy:
    Zuchiewicz, W.
    Oszczypko, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/191413.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    morphotectonics
    neotectonics
    Pliocene–Quaternary
    Magura thrust
    Outer Carpathians
    Polska
    Opis:
    Neotectonic (Pliocene-Quaternary) elevations and depressions detected on maps of subenvelope surfaces of the topography of the Outer West Carpathians of Poland are, to a certain extent, portrayed on the map showing topography of the Magura floor thrust, particularly in the western segment of the study area. The floor thrust of the Magura Nappe is highly uneven, its position changing from 725 m a.s.l. to more than 7,000 m b.s.l. The most prominent depression is located in the medial (S of Dunajec and Poprad confluence) segment of the Polish Outer Carpathians (2-7 km b.s.l.), and its axis trends NW-SE from the eastern margin of the Mszana Dolna tectonic window to the Poprad River valley. Another, much more shallower, Jordanów depression (2 km b.s.l.) is to be found NW of the Mszana Dolna tectonic window, shortly north of the Skawa River valley. Elevated structures, in turn, include the Mszana Dolna tectonic window, Sól-Skomielna (on the west), and Limanowa (on the east) elevations of subparallel orientation. Still farther to the east, a longitudinal elevation extending between the Klęczany-Pisarzowa and Świątkowa tectonic windows is to be seen some 10-15 km south of the Magura frontal thrust. South of this area, the Magura floor thrust slopes steeply down to more than 4 km b.s.l. A comparison between the pattern of elevated and subsided structures of the Magura floor thrust and subenvelope surfaces of different orders shows that in the western part of the Polish Outer Carpathians the highest-elevated neotectonic structures (in the southern portion of that area) coincide with depressions of the Magura thrust, whereas farther north a reverse pattern becomes dominant: neotectonic elevations coincide either with the Magura frontal thrust or with elevations of its surface. This is particularly true for an area comprised between 20° and 20°30’E meridians. The origin of such relationships is difficult to explain. We infer that one of possible factors could be Pliocene-Quaternary reactivation of faults cutting the Magura floor thrust, and particularly that one, which appears to separate the western-medial segment of the Outer Carpathians from their more eastern portion.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2008, 78, No 2; 135-149
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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