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    Wyświetlanie 1-5 z 5
    Tytuł:
    Heavy minerals in the key Late Pleistocene loess-palaeosol section at Kolodiiv (East Carpathian Foreland, Ukraine)
    Autorzy:
    Racinowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059497.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Ukraine
    Late Pleistocene
    loess
    palaeosols
    heavy minerals
    Opis:
    Successions of loess and other deposits in the Kolodiiv profile, formed during the Eemian Inter glacial and Vistulian Glacial (OIS 5-2), are characterized using the results of heavy mineral analysis. Weathered local carbonate rocks and fluvial deposits (Wartanian Glacial, OIS 6) are used for comparison. It was found that the content of minerals derived from weathered and redeposited Carpathian Flysch increases from bottom to top of the profile. The entire loess succession accumulated under similar lithodynamic conditions and the palaeosols are of similar character.
    Źródło:
    Geological Quarterly; 2007, 51, 2; 185-188
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeoclimate and pedosedimentary reconstruction of a middle to late Pleistocene loess-palaeosol sequence, Prymorske, SW Ukraine
    Autorzy:
    Stephens, Mark
    Krzyszkowski, Dariusz
    Ivchenko, Andriy
    Majewski, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2027392.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ukraine
    Quaternary
    loess
    palaeosols
    magnetic susceptibility
    Opis:
    A new investigation and palaeoenvironmental reconstruction of the locss-palaeosol sequence at Prymorskc, SW s q Ukraine is presented using soil structures, grain size, mineral magnetics, organic carbon and calcium carbonate determinations. Six units of the established Ukraine Quaternary stratigraphical scheme have been identified and analysed above and including the Zavadivka (Holsteinian) marker horizon - Dnieper, Kaidaky, Tiasmyn, Pryluky and Udai. Precipitation and temperature are tentatively reconstructed from soil and sedimentary proxies calibrated by modern analogues. Increased temperatures and precipitation to today are inferred for the red-brown Zavadivka palaeosol. Overlying Zavadivka is the Dnieper loess containing a gley and two chernozcms above, possibly representing climatic variations of the Saalian Glaciation. The calcified chernozem Kaidaky is separated by a thin loess from the brown/ chestnut Pryluky palaeosol (Eemian) which has features indicating drier conditions to the present. Non-gleyed palaeosols exhibit an enhanced magnetic susceptibility (MS) signal relative to the less weathered loess and highlights the palaeoclimatic potential of the technique. The most well developed palaeosol from this study has the highest MS value (Zavadivka: 80-1 o·8 SJ units) but this relationship is not always found in the Black Sea region. Previous MS analyses at Prymorske (Nawrocki et al. 1999) report significantly higher values to those of this study. Consequently the MS curve at Prymorske cannot be used with confidence for palaeoenvironmental reconstruction and inter-regional correlation without further investigation and modern analogue study.
    Źródło:
    Studia Quaternaria; 2002; 3-17
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chronostratigraphy and changes of environment of Late Pleistocene and Holocene at Starunia palaeontological site and vicinity (Carpathian region, Ukraine)
    Autorzy:
    Sokołowski, T.
    Stachowicz-Rybka, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/191571.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Late Pleistocene
    Holocene
    fluvial deposits
    environment
    Starunia
    Carpathian region
    Ukraine
    Opis:
    This paper presents the results of absolute dating and biostratigraphical analysis carried out for alluvial sediments of an abandoned Starunia ozokerite mine located in the Velyky Lukavets River valley, in which large mammal remains were discovered in the first half of the 20th century. The sediments build up three terrace levels. The highest one, up to 8 m high (terrace II), is likely to be associated with a stage of aggradation, as well as with a short episode of valley broadening, which occurred in the Weichselian Late Pleniglacial. The lower one, 4 m high (terrace I), is most likely to be linked with the Holocene, despite a considerable transformation of its top due to mining activity. The lower part of this terrace cover bears coarse-grained channel sediments dated to 120.6-58.9 ka BP (Eemian Interglacial?-Early Pleniglacial - OIS 5e, 4 and 3), and overbank (distal floodplain) mud with intercalations of biogenic deposits (peat, peat mud and biogenic mud). The overbank deposits are dated to 48.2-11.11 ka BP (Glinde Interstadial?-Younger Dryas, OIS 3-2) and are overlain by Holocene (OIS 1) mud and biogenic deposits. In boreholes drilled in the vicinity of the present-day river channel, younger sediments occur more frequently. These include sediments originating from the Late Weichselian overlain by Holocene sediments. However, sediments originating exclusively from the Holocene are infrequent. The deposition of sediments took place in specific conditions of a permanent saturation of the environment with brine, petroleum and thickened bitumen. In the longest period of deposition (48.2-1.27 ka BP), ephemeral swamps, ponds and lakes were developed in different parts of the floodplain. They were marked by the presence of: Juncus glaucus/effusus, J. articulatus, Typha sp., Batrachium sp., Potamogeton filliformis, Bidens tripartita, Ranunculus sceleratus and Phragmites communis, as well as by halophytic species, like: Zannichellia palustris, Triglochin maritimum, Schoenoplectus tabernemontani, Puccinelia distans and Eleocharis palustris. Rhythmic oscillations between cold and warm climatic conditions, typical of the Weichselian age and well identified in Western Europe, are here marked by the changes of plant communities (woody assemblages passing into steppe and tundra), but are not noticeably recorded in the sediments of the Velyky Lukavets River. This shows that the greatest part of the discussed period involved the formation of poorly differentiated silty overbank sediments with intercalations of biogenic sediments. However, the variability of sediments provides evidence for extreme events which occurred in the Holocene.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2009, 79, No 3; 315-331
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Pleistocene vegetational and soil evolution at the Kiev loess plain as recorded in the Stari Bezradychy section, Ukraine
    Autorzy:
    Gerasimenko, Natalia G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2026769.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Pleistocene
    paleosol
    loess
    pollen
    Ukraine
    Opis:
    Pollen and palcopedological studies have been carried out in parallel for the Stari Bezradychy sequence of the Upper Pleistocene age. The paleoenvironmental information derived from both sets of data is in general well correlated. The section presents a rather complete sequence of the last interglacial-glacial cycle. It includes eight units of the Ukrainian Stratigraphical Framework of the Pleistocene. Interglacial climatic optimum is registered by pollen succession of the Mikulino (Ecmian) type in the climax forest palcosols of Pryluky-Kaydaky pedocomplcx at the base of the sequence, above the Dnieper Glacial deposits. The coldest and most continental environment is recorded in the youngest loess. The soils of Upper Pryluky, Yytachiv and Dofinivka units are correlated with the Early Glacial and four Plcniglacial interstadials. Multiple environmental variations during the Upper Pleistocene recorded in the Stari Bezradychy sequence arc important for study of global climatic changes and interregional correlation. Tentative correlation with marine isotopic stages is proposed.
    Źródło:
    Studia Quaternaria; 2000, 17; 19-28
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemical composition of Vistulian loess and micromorphology of interstadial palaeosols at the Kolodiiv site (East Carpathian Foreland, Ukraine
    Autorzy:
    Łącka, B.
    Łanczont, M.
    Madeyska, T.
    Boguckyj, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059503.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Ukraine
    Late Pleistocene
    palaeosols
    loess
    micromorphology
    geochemistry
    Opis:
    This paper summarizes geochemical and palaeopedological investigations of the Upper Pleistocene loess-palaeosol sequences at the Kolodiiv site. The Kolodiiv 2, 3 and 5 profiles were selected for this study. The Kolodiiv 2 profile contains loesses, interglacial (Eemian) and interstadial (Vistulian) palaeosols. A set of Early Vistulian soils over lying Eemian gyttja and peat is exposed in the Kolodiiv 3 and 5 profiles. The mineral composition of the 50-2 mm silt fraction was analysed using non-oriented powder samples by means of X-ray dif - fraction. The total concentrations of nine major (Si, Ti, Al, Fe, Mn, Mg, Ca, K and Na) and nine trace elements (Zn, Pb, Ni, Rb, Cr, Sr, Ba, Co, V) as well as the humus content and loss on ignition were measured. The major elements concentrations in mineral deposits from the Kolodiiv 2 loess-palaeosol sequence indicate that the loess particles were derived from poorly weathered source rocks that have under - gone at least one sedimentary cycle. Climatic conditions have strongly in fluenced the mobilization and accumulation of elements in the palaeosol horizons due to the changes in the intensity of weathering and pedogenic processes. For the micromorphological study, ten samples from the Kolodiiv 3 and 5 profiles were used. Thin sections representing the Kolodiiv and Dubno set of palaeosols from Early Vistulian and Middle Pleniglacial show, be sides palaeopedologic characteristics, significant evidence of redeposition of sediments and soils.
    Źródło:
    Geological Quarterly; 2007, 51, 2; 127-146
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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