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    Wyświetlanie 1-5 z 5
    Tytuł:
    The Upper Cretaceous variegated shales in the Ropianka Formation of the Magura Nappe (Outer Carpathians) : age and lithostratigraphic position
    Autorzy:
    Waśkowska, Anna
    Szczęch, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/31342966.pdf
    Data publikacji:
    2023
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Campanian-Maastrichtian
    red beds
    lithostratigraphy
    biostratigraphy
    foraminifera
    Opis:
    The lithological characteristics and age analysis of the variegated Farony Shale are presented for the first time. The Farony Shale occurs in the Lubomierz and Rabka areas in the Bystrica Subunit. It is located within medium- and thin-bedded sandy dominated turbidites of the Campanian–Paleocene Ropianka Formation. It is comprised of red shales laminated or interlayered with strongly bioturbated green shales. Exposures of the Farony Shale are observed along a distance of ~25 km, in the form of a narrow belt. The age of the variegated deposits is estimated based on agglutinated foraminifera to late Campanian–earliest Maastrichtian. Their deposition was associated with low-energy conditions and a temporary limitation of the supply of sandy material to the inner part of the Magura Basin.
    Źródło:
    Geological Quarterly; 2023, 67, 2; art. no. 18
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Eocene Hieroglyphic beds of Silesian Nappe in Western Polish Carpathians : development and foraminiferal record
    Autorzy:
    Waśkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060290.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Hieroglyphic beds
    Silesian Nappe
    Outer Carpathians
    Eocene
    foraminifera
    lithostratigraphy
    Opis:
    The sedimentation of Hieroglyphic beds of the Silesian Nappe took place between the Lower and Middle Eocene and Upper Eocene within the Carpathian Silesian Basin. These beds are represented by thin-bedded flysch containing – at various stratigraphic positions – sandstone-less complexes with variegated shales and bentonite laminae developed in conditions of calm sedimentation with a limited supply of material from the land. The profiles of Hieroglyphic beds of the Silesian Nappe are diversely developed. Their variability and borderline sequences, transitory into overlying and underlying divisions, are presented. In the Ypressian, during the sedimentation of Hieroglyphic beds, foraminiferal associations with numerous small sized Trochammina developed, which formed in the Silesian Basin after the PETM crisis. Since the Lutetian, in slightly more favourable conditions, more differentiated associations have occurred, with Reticulophragmium amplectens (Grzybowski), Ammodiscus (Dolgenia) latus (Grzybowski), and Reticulophragmium gerochi Neagu et al., which preferred cool waters, being index fossils for stratigraphy. Hieroglyphic beds developed during an interval of the gradually cooling climate. The gradual decrease in temperature stimulated the transfer of species: in the Eocene associations of Hieroglyphic beds a number of thermophilous forms, whose optimum of development came in the Upper Cretaceous-Paleocene, disappeared whereas new species appeared which prefer cold waters commonly occurring in boreal basins. The deep restructuring of foraminiferal assemblages took place in the Priabonian, when massive numbers of calcareous benthonic and planktonic forms occurred.
    Źródło:
    Geological Quarterly; 2015, 59, 2; 271--299
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stratigraphy of the Hieroglyphic Beds with “Black Eocene” facies in the Silesian Nappe (Outer Flysch Carpathians, Poland)
    Autorzy:
    Waśkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191339.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Eocene
    Outer Carpathians
    Hieroglyphic Beds
    foraminifera
    biostratigraphy
    dark shales
    Opis:
    The lithologic variation and biostratigraphy of the Hieroglyphic Beds were examined in the Szczyrzyc Depression, where four lithologic complexes were distinguished. The biostratigraphy is based on agglutinated foraminifera and supported by scarce planktonic foraminifera. The lower part of the Hieroglyphic Beds contains non-characteristic, Ypresian foraminifers, including assemblages of small-sized Trochammina and at successively higher levels representatives of the Bartonian Ammodiscus latus Zone and the Priabonian Reticulophragmium gerochi Zone. The upper part of the Hieroglyphic Beds, composed of dark shales enriched in TOC (1–2%), corresponds to the deposits of the so-called Black Eocene, known from the Fore-Magura group of nappes. Redeposited flysch rocks resulting from episodes of subaqueous mass flow occur in the lower Bartonian part of the section.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 2; 321-343
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Importance of the Mellala section (Traras Mountains, northwestern Algeria) for the correlation of the Pliensbachian-Toarcian boundary
    Autorzy:
    Elmi, S.
    Marok, A.
    Sebane, A.
    Almeras, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061371.pdf
    Data publikacji:
    2009
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Pliensbachian-Toarcian boundary
    NW Algeria
    biostratigraphy
    Eodactylites beds
    Koninckella fauna
    foraminifera
    Opis:
    In the Mellala profile, located in the Traras Mountains (Tlemcen Domain, NW Algeria), the hemipelagic Bayada Fm. includes the transition from the Pliensbachian to the Toarcian within a continuous succession of alternating marls and marly limestones, whose thickness reaches approximatively 50 m.The Bayada Fm. begins in the Upper Domerian. The Solare Subzone of the Emaciatum Zone is proved by the occurence of several Pleuroceras solare (Phillips) in the lower part, associated with Emaciaticeras upwards. The Elisa Subzone is characterized by Tauromeniceras elisa (Fucini), Canavaria finitima (Fucini), Paltarpites bettonii (Fucini) associated with numerous Phymatothyris kerkyreae (Renz) and rare Lobothyris punctata (Sowerby). Leioceratoides gr. serotinus (Bettoni) has been found in the upper part of the subzone. The base of the lowermost Toarcian (Mirabile Horizon, Paltus Subzone) is marked by a decimetric bed (no. 38) with Paltarpites paltus (Buckman) but which has not yielded Eodactylites in the present state of the research. The following calcareous bed (no. 40) has yielded several Dactylioceras (Eodactylites) polymorphum (Fucini), D. (E.) mirabile (Fucini) and D. (E.) pseudocommune (Fucini). Upwards, Eodactylites is abundant over 10 to12 m, especially in Bed no. 44. At 3.50 m below the top, a marker-bed corresponds to a lenticular level of bioclastic quartz-rich limestones that marks the limit between the two members of the formation. The overlying 15 m are attributed to the Semicelatum Subzone (Tethyan nomenclature). At the base a level with D. (Orthodactylites) crosbeyi (Simpson) allows a good correlation with the Clevelandicum Subzone (or Horizon) of Northwestern Europe. The topmost 5 m of the outcrop are dated to the Levisoni Zone with Eleganticeras sp. The anoxic event of the beginning of this Zone is indicated only by an abnormal variability of the foraminifera. The presence of Lenticulina obonensis Ruget indicates stressing conditions. The occurrence, from the Upper Domerian to the Polymorphum Zone, of a fauna comprising the brachiopod Koninckella is important because it confirms that the environment was restricted within a deep, strongly subsiding basin (the "umbilicus").
    Źródło:
    Volumina Jurassica; 2009, 7, 1; 37-45
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Calcareous nannofossils and foraminifera from the youngest deposits of the Siary Subunit (Oligocene, Magura Nappe, Polish Outer Carpathians)
    Autorzy:
    Garecka, M.
    Szydło, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/191190.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    calcareous nannoplankton
    foraminifera
    palaeoenvironment
    Gładyszów Beds
    Siary Subunit
    Magura Nappe
    Outer Carpathians
    Oligocene
    Opis:
    The calcareous nannoplankton and foraminifera from the Gładyszów Beds, regarded as the youngest deposits in the northern marginal Siary Subunit of the Magura Nappe in Poland, are characterized. The material investigated comes from outcrops in the vicinity of Gładyszów and from the Gładyszów PIG-1 borehole. The analysis allowed the establishment of the age of these deposits as not older than late Rupelian–early Chattian (the calcareous nannoplankton NP24 Zone). The taxonomic affiliations, environmental associations and preservation of the microfossils were analyzed to document the sedimentary processes and environmental conditions during the geotectonic transformation of the Magura Basin in the Oligocene. These microfossils also were compared with those reported from the terminal deposits of the Outer Carpathians and the Podhale Basin.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 1; 205-219
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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