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    Wyświetlanie 1-4 z 4
    Tytuł:
    The earliest Pleistocene interglacials in Lithuania in the context of global environmental changes
    Autorzy:
    Baltrūnas, V.
    Zinkutė, R.
    Šeirienė, V.
    Katinas, V.
    Karmaza, B.
    Kisielienė, D.
    Stakėnienė, R.
    Pukelytė, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059977.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    environmental changes
    geochemistry
    magnetic susceptibility
    palaeobotany
    Early-Middle Pleistocene
    Lithuania
    Opis:
    Investigations have been carried out in order to reconstruct the palaeoenvironmental changes during the earliest Pleistocene interglacials and to establish their relation to global environmental changes. Three sections in east Lithuania exposing the earliest Pleistocene lacustrine deposits lying between the Kalviai (Glacial B, Nidanian?) and Dzūkija (Sanian 1) and between Dzūkija (Sanian 1) and Dainava (Sanian 2) glacial deposits were selected for study. Until now the Šlavė-2 and Vindžiūnai-136 successions were considered to have formed during the Vindžiūnai (Augustovian?, Malopolanian) Interglacial and the Kudrė-915 succession during the Turgeliai (Cromerian IV, Ferdynandovian) Interglacial. Geochemical, palaeomagnetic, magnetic susceptibility, anisotropy of magnetic susceptibility and palaeobotanical proxies were applied to establish the cyclicity and dynamics of palaeoenvironmental change. The data obtained enable the subdivision of the section into units related to changes in the sedimentary environment. The Matuyama/Brunhes boundary and Jaramillo subchron of the Matuyama chron have been recognized in the Šlavė section. The results enable correction of the stratigraphic position of the sections studied. The sedimentation in the Šlavė section took place during the Early Pleistocene, while that at the Vindžiūnai-136 and Kudrė-915 took place during two different Middle Pleistocene interglacials.
    Źródło:
    Geological Quarterly; 2014, 58, 1; 145--162
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentary environment changes during the Early-Middle Pleistocene transition as recorded by the Daumantai sections in Lithuania
    Autorzy:
    Baltrūnas, V.
    Zinkutė, R.
    Katinas, V.
    Karmaza, B.
    Šeirienė, V.
    Kisielienė, D.
    Taraškevičius, R.
    Lagunavičienė, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060022.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Early-Middle Pleistocene
    environmental changes
    geochemistry
    magnetic susceptibility
    plant macroremains
    Lithuania
    Opis:
    Two sections (Daumantai-1 and Daumantai-3) in East Lithuania expose Early-Middle Pleistocene lacustrine-alluvial, deposits which lie on a thin Neogene layer and on older Devonian rocks. They are overlain by glacigenic deposits. Geochemical, palaeomagnetic, magnetic susceptibility, plant macrofossil, and diatom investigations were performed to determine the changes in the sedimentary environment. Cluster analysis of the geochemical variables (10 major elements, 16 trace elements, total organic and inorganic carbon) revealed the element groups and factors. The lowermost units are characterized by a major influence of local material and significant fluctuations in heavy mineral content. These fluctuations might reflect short-term climate changes. The transitional units have more expressed trends, especially as regards the trace elements and Zr/Ti. The uppermost units are characterized by a slight influence of local material and small fluctuations in trace elements. The data analysed enable the subdivision of the section into units related to changes in sedimentary environment. The boundary of the Bruhnes/Matuyama reversal in the Daumantai-1 and Daumantai-3 sections was detected by palaeomagnetic studies and enables the stratigraphical correlation of these deposits.
    Źródło:
    Geological Quarterly; 2013, 57, 1; 45--60
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New palaeoclimate reconstructions based on multidisciplinary investigation in the Ferdynandów 2011 stratotype site (eastern Poland)
    Autorzy:
    Stachowicz-Rybka, R.
    Pidek, I. A.
    Żarski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060375.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    palynostratigraphy
    climatostratigraphy
    plant macroremains
    early Middle Pleistocene
    MIS 13–15
    Eastern Poland
    Opis:
    Drilling carried out in 2011 at Ferdynandów (E Poland), serving as a stratotype for the Ferdynandovian Interglacial, enabled its re-examination with high-resolution palynological, plant macroremains, and sedimentological analyses. Lacustrine sediments included a record of the Late Sanian 1 (= Elsterian 1) Glaciation, a complete Ferdynandovian succession, and the Early Sanian 2 (= Elsterian 2) Glaciation. Particular similarities in the succession observed between the Ferdynandów 2011 profile and the adjacent sites of the same age in Łuków-3A and Zdany provide a basis for detailed palaeoclimate interpretation. The Ferdynandovian succession of all the three pollen profiles can be clearly divided into two distinct interglacials separated by a sequence of pollen spectra typical of a glacial succession with pollen zones of stadial-interstadial fluctuations. Warm units in the Ferdynandów 2011 succession correspond to climatostratigraphic units of Ferdynandovian 1 and 2, while the cold unit – to Ferdynandovian 1/2. This division can be applied to all Ferdynandovian successions in Poland and allows their correlation with the early Middle Pleistocene Cromerian Complex of Western Europe (Cromerian II Westerhoven and Cromerian III Rosmalen) as well as with Marine Isotope Stages (MIS) 13–15. For each biostratigraphic unit, mean temperatures of the warmest and coldest months, and mean annual temperature and precipitation were reconstructed. For the comparison with the Ferdynandów 2011 pollen diagram the data based on modern pollen analogues for the Łuków-3A pollen diagram were used.
    Źródło:
    Geological Quarterly; 2017, 61, 2; 276--290
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of Early and Middle Pleistocene river valley systems in Polish-Ukraine-Belarus cross-border areas based on geological and malacological proxies
    Autorzy:
    Lindner, L.
    Szymanek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060442.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Early Pleistocene
    Middle Pleistocene
    buried river valleys
    Bug-Pripyat interfluve
    Polish-Ukraine-Belarus cross-border areas
    molluscs
    Opis:
    The geological setting of the Bug-Pripyat interfluve and the close proximity of the source of the Pripyat River to the well-developed Middle Bug River valley suggest that these rivers may have been connected in the past. Analysis of geological cross-sections around the Polish-Ukraine-Belarus cross-border areas together with study of associated Pleistocene palaeoflora shows that buried alluvial deposits of the proto-Bug and proto-Pripyat clearly represent the Preglacial (MIS 103-23), Podlasian/Turskian-Donian/Brest Interglacial (Cromerian I-II; MIS 21-17) and the Mazovian/Likhvinian/Alexandrian Interglacial (Holsteinian; MIS 11c). Their elevated position in mid-eastern Poland suggests the possibility of accumulation by proto-Bug waters flowing eastwards, which determined the formation and development of the lower-lying proto-Pripyat valley system in northwestern Ukraine at those times. The occurrence of the Ponto-Caspian species Lithoglyphus naticoides (C. Pfeiffer, 1828), Borysthenia naticina (Menke, 1845) and Corbicula fluminalis (O.F. Müller, 1774) in the mollusc assemblages of the Mazovian/Likhvinian/Alexandrian Interglacial implies that the main watershed between the Baltic Sea and the Black Sea drainage basins might have been situated in the northern part of the area studied. Presumably its main part was drained by the waters of the proto-Bug catchment connected with the proto-Pripyat and flowing farther to the east towards the Dnieper River entering the Black Sea.
    Źródło:
    Geological Quarterly; 2018, 62, 3; 620--630
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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