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Wyszukujesz frazę "Ropianka Formation" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Late Cretaceous foraminiferids from sections in the Zabratówka area (Skole Nappe, Outer Carpathians)
Autorzy:
Kowalczewska, O.
Gasiński, A.
Powiązania:
https://bibliotekanauki.pl/articles/191830.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Foraminiferids
palaeobathymetry
Late Cretaceous
Maastrichtian
Skole Nappe
Ropianka Formation
Outer Carpathians
Opis:
Well preserved Late Cretaceous–Palaeogene planktonic and benthic foraminiferal assemblages were studied in the Zabratówka section of the Ropianka Formation in the Skole Nappe. The Racemiguembelina fructicosa and Abathomphalus mayaroensis standard foraminiferal biozones were distinguished. The K-T boundary was recognized within the interval between samples ZB10B–ZB9A, mainly composed of marly mudstones, interlayered with thin-bedded sandstones, and is characterized by the disappearance of planktonic taxa and an abundance of agglutinated species. Foraminiferal assemblages, collected from the turbiditic flysch-type sediments, indicate a primary depositional environment on the outer shelf to the upper part of the continental slope, with shallowing during the Maastrichtian in the part of the Skole Basin studied. The foraminiferids correspond to the assemblages of a palaeobiogeographical “transition” zone, located between the Boreal and Tethyan domains.
Źródło:
Annales Societatis Geologorum Poloniae; 2018, 88, 1; 71-85
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Ropianka Formation of the Bystrica Zone (Magura Nappe, Outer Carpathians : proposal for a new reference section in northwestern Orava
Autorzy:
Teťák, F.
Cieszkowski, M.
Golonka, J.
Waśkowska, A.
Szczęch, M.
Powiązania:
https://bibliotekanauki.pl/articles/191696.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Outer Carpathians
lithostratigraphy
Late Cretaceous–Paleocene
Magura Nappe
Bystrica Zone
Ropianka Formation
Szczawina Member
Orava
Opis:
The thin- and medium-bedded, turbiditic deposits that are exposed in the Bystrica Zone of the Magura Nappe in the Slovak Orava region are the subject of this study. On the basis of lithological features as well as age and stratigraphic position, they are assigned to the Ropianka Formation. The very well exposed rocks of this formation, recognized in the Biela Farma profile in the Slovak part of the northwestern Orava region, are compared with analogous deposits in the Polish Orava and the Beskid Wysoki Mountains. Lithological and biostratigraphical documentation of the Ropianka Formation is presented. This documentation allowed the determination of the age of the rocks studied. Abundant and taxonomically diverse foraminiferal assemblages of agglutinated, benthonic and occasional planktonic forms indicate a Middle Paleocene age for the upper part of the Ropianka Fm. A new stratigraphic position for the Szczawina Sandstone, considered to be a member of the Ropianka Fm, is proposed. The lithostratigraphy of the Ropianka Fm in the Magura Nappe in Poland, Slovakia and the Czech Republic requires further investigation, including the establishment of new type and reference sections. The large outcrop at Biela Farma should be taken into consideration as a potential reference section. Studies of the new sections will lead to a new monographic elaboration of the Ropianka Fm in Poland, Slovakia and the Czech Republic.
Źródło:
Annales Societatis Geologorum Poloniae; 2017, 87, 3; 259-274
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detrital tourmaline as an indicator of source rock lithology : an example from the Ropianka and Menilite formations (Skole Nappe, Polish Flysch Carpathians)
Autorzy:
Salata, D.
Powiązania:
https://bibliotekanauki.pl/articles/2059972.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
detrital tourmaline
source rocks
Ropianka Fm.
Menilite Formation
Skole Nappe
Outer Carpathians
Opis:
Tourmaline populations studied from the Campanian-Maastrichtian part of the Ropianka (Upper Cretaceous-Paleocene) and Menilite (Oligocene) formations of the Polish Carpathians, represent a mixture of first-cycle and polycyclic grains. The tourmalines of the deposits studied display very strong resemblance in terms of optical features and chemical composition. They belong mostly to the schorl-dravite series with a minor contribution of tourmalines of foititic or Mg-foititic composition. Euhedral tourmalines originated from metasedimentary rocks, while the rounded grains crystallised in Li-poorgranitic rocks or in pegmatites, Al-poor and Al-rich metasedimentary rocks. Most of the tourmalines studied crystallised during a single igneous or metamorphic event. However, tourmal ines form ng in evolving chemical conditions as well as polymetamorphic grains (having a metamorphic detrital core and metamorphic overgrowths) are also present. The chemical composition of the metamorphic tourmalines studied indicates theirformation in medium-grade metamorphic conditions. This is supported by the crystallisation temperature of the garnet-biotite inclusion present in one of rounded metamorphic tourma l ines from the Ropianka Formation. The euhedral grains derive from metasediments, directly from a massif located close to the Skole Basin. The scarcity of euhedral grains in the tourmaline populations studied suggests that their source rocks were poor in these minerals. The direct sources of rounded tourmalines (most probably polycyclic grains), may have been Paleozoic and Mesozoic sedimentary rocks of the Skole Basin foreland or crystalline rocks of remote source areas. The initial igneous and metamorphic host rocks of the tourma l ines may have been crystall ine domains of the Bohemian Massif and/or the crystalline basement of Brunovistulicum.
Źródło:
Geological Quarterly; 2014, 58, 1; 19--30
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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