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Wyszukujesz frazę "Upper Cretaceous" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Porosphaera globularis (Phillips, 1829) (Porifera, Calcarea) in the Campanian (Upper Cretaceous) of extra-Carpathian Poland
    Autorzy:
    Jurkowska, A.
    Świerczewska-Gładysz, E.
    Dubicka, Z.
    Olszewska-Nejbert, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/138587.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Porosphaera globularis
    Calcareous sponges
    Campanian
    extra-Carpathian Poland
    gąbka wapienna
    kampan
    Karpaty
    Polska
    Opis:
    The stratigraphical distribution of Porosphaera globularis, a common calcareous sponge in the Upper Cretaceous (mostly Campanian and Maastrichtian) of Poland was studied. The presented material, both new and from museum collections, comes from the Campanian of the Miechów Synclinorium, in southern Poland, and from the Lower Campanian of Mielnik in the south-eastern part of the Mazury-Podlasie Homocline, in eastern Poland. The significance of the species in extra-regional correlation, its palaeobiogeography and stratigraphical potential is critically reviewed.
    Źródło:
    Acta Geologica Polonica; 2015, 65, 1; 121-139
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facies and sedimentation of Coniacian deposits of the Kraków Swell in the Wielkanoc area (southern Poland)
    Autorzy:
    Olszewska-Nejbert, D.
    Świerczewska-Gładysz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060011.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Upper Cretaceous
    Coniacian
    synsedimentary tectonics
    Kraków Swell
    microfacies
    ponges
    Opis:
    Coniacian deposits, ca. 1.5 m thick, cropping out in the Wielkanoc Quarry, north of Kraków in southern Poland, consist of firm, nodular and, less commonly, marly limestones with horizons of in situ, slightly phosphatized hexactinellid sponges and thick-shelled inoceramid bivalves. The succession is composed of foraminiferal-inoceramid packstones with common sand-sized quartz and glauconite grains at the base, passing upwards into foraminiferal or foraminiferal-inoceramid wackestones with or without rare glauconite. A microfacies analysis shows that planktonic foraminifers are the dominant forms, while benthic forms are rare. The facies indicates that sedimentation in the Wielkanoc area on the Kraków Swell, which separated the deeper Mid-Polish Trough Zone to the north-east and the Opole Trough Zone to the south-west, was generally calm (documented by abundant wackestones) and slow (indicated by the dominant sedimentary “coccolith system” and presence of glauconite) during the Coniacian. Rare episodes of non-deposition are recorded by episodes of phosphatization and minor intra-Coniacian discontinuity surfaces. The presence of hexactinellid sponges in the section studied are consistent with a calm environment, below the storm-wave base, with low rates of sedimentation. Subhercynian (latest Turonian–Coniacian Ilsede Phase) local tectonic movements had an important influence on the evolution of the region. They presumably led to subsidence of the Wielkanoc Block during the Early Coniacian. These movements were probably associated with activity on the Kraków–Myszków Fault Zone.
    Źródło:
    Geological Quarterly; 2013, 57, 1; 1--16
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Turonian and Early Coniacian ventriculitid sponges (Lychniscosida) from Opole Trough (southern Poland) and their palaeoecological significance
    Autorzy:
    Świerczewska-Gładysz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/191238.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    sponges
    Lychniscosida
    taxonomy
    palaeoecology
    Upper Cretaceous
    Opole Trough
    southern Poland
    Opis:
    Eight species of ventriculitid sponges (Order Lychniscosida Schrammen, 1903) are described from the Upper Turonian marly limestones and Lower Coniacian marls of the Opole Trough (southern Poland). Among them four have not previously been noted in this area. Two species, Astropegma stellata (Roemer, 1840) and Leiostracosia robusta (Schrammen, 1902) are reported from Turonian strata for the first time. The occurrence of ventriculitid sponges in the Upper Turonian–Lower Coniacian succession of the Opole Trough indicates a soft- bottom, calm-water environment, with depths below the storm-wave base and a low rate of sedimentation.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2012, 82, 3; 201--224
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Cretaceous siliceous sponges from the Middle Vistula River Valley (Central Poland) and their palaeoecological significance
    Późnokredowe gąbki krzemionkowe z doliny środkowej Wisły (Polska Centralna) i ich znaczenie paleoekologiczne
    Autorzy:
    Świerczewska-Gładysz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/191690.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    sponges
    Hexactinosida
    Lychniscosida
    lithistids
    taxonomy
    palaeoecology
    Upper Cretaceous
    Central Poland
    Opis:
    Siliceous sponges are extremely abundant in the Upper Campanian-Maastrichtian opokas and marls of the Middle Vistula River Valley, situated in the western edge of the Lublin Basin, part of the Cretaceous German-Polish Basin. This is also the only one area in Poland where strata bearing the Late Maastrichtian sponges are exposed. The presented paper is a taxonomic revision of sponges collected from this region. Based both on existing and newly collected material comprising ca. 1750 specimens, 51 species have been described, including 18 belonging to the Hexactinosida, 15 - to the Lychniscosida and 18 - to Demospongiae. Among them, 28 have not been so far described from Poland. One new genus Varioporospongia, assigned to the family Ventriculitidae Smith and two new species Varioporospongia dariae sp. n. and Aphrocallistes calciformis sp. n. have been described. Comparison of sponge fauna from the area of Podilia, Crimea, Chernihov, and Donbas regions, as well as literature data point to the occurrence of species common in the analysed area and to the basins of Eastern and Western Europe. This in turn indicates good connections between particular basins of the European epicontinental sea during the Campanian-Maastrichtian. Analysis of the taxonomic composition of the Middle Vistula assem- blage suggests that the occurring sponge fauna is transitional between the faunas of Eastern and Western Europe, what may be linked with the central location of the Lublin Basin in the European epicontinental sea. The gradual upward decrease of taxonomic diversity of the Hexactinosida and Lychniscosida in the studied succession points to gradual basin shallowing, what is consistent with the global regressive trend by the end of the Cretaceous. The domination of the Hexactinellida over the lithistids in terms of diversity and abundance in the entire section allows us to estimate the maximum depth of the Late Campanian basin as 200-250 m and to constrain the minimum depth during the latest Maastrichtian as about 100 m.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2006, 76, No 3; 227-296
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hexactinellid sponge assemblages across the Campanian.Maastrichtian boundary in the Middle Vistula River section, central Poland
    Autorzy:
    Świerczewska-Gładysz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/139147.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ekologia
    gąbki
    kampan
    kreda górna
    mastrycht
    Polska
    Campanian-Maastrichtian boundary
    ecology
    Hexactinosida
    Lychniscosida
    southern Poland
    sponges
    Upper Cretaceous
    Opis:
    The sponge fauna from the Upper Campanian.lowermost Maastrichtian succession of the Middle Vistula River valley (central Poland) is represented mainly by dictyid hexactinellid sponges (Hexactinosida and Lychniscosida). Their greatest abundance and taxonomic variability is noted in the "Inoceramus" inkermanensis Zone (Upper Campanian), and they are less diverse in the overlying (Upper Campanian) Trochoceramus costaecus Zone and lower "Inoceramus" redbirdensis Zone. In the upper "Inoceramus" redbirdensis Zone (basal Maastrichtian in the sense of the Tercis rather than the Boreal definition) they are extremely rare. With the beginning of the Maastrichtian the number of dictyid sponges gradually increases. The observed changes in the abundance and taxonomic variability of the dictyid sponges indicate environmental changes in the latest Campanian.earliest Maastrichtian sea in the area. It seems that changes in basin bathymetry, confined to eustatic sea-level changes in the latest Campanian and early Maastrichtian, were the most important factor. Progressive shallowing of the basin in the latest Campanian drastically restricted the development of dictyids. In the peak regression, the sea level could have fallen to only several tens of metres. The gradual recovery of the sponge assemblages correlates with subsequent deepening of the basin with the start of the Maastrichtian.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 4; 561-580
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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