Podrobnosti záznamu

Název
    Silurian and Devonian foraminifers and other acid-resistant microfossils from the Barrandian Area
Údaj o odpovědnosti
    Katarína Holcová
Autor
    Holcová, Katarína
Jazyk
    anglicky
Zdrojový dokument - seriál
    Sborník Národního muzea v Praze. Řada B, Přírodní vědy
Svazek/č.
    Vol. 58, no. 3-4
Strany
    p. 83-140, příl.
Rok
    2002
Poznámky
    51 obr. v textu, 22 pl. v příl.
    il.
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Sbor. Nár. Muz. (Praha), Ř. B
Klasifikační znak
    55(1)
    551.7
    551.8
    562/569
Skupina konspektu
    55
Předmětová skupina
    Barrandien
    devon
    Foraminifera
    incertae sedis
    lokalita fosiliferní
    Ostracoda
    paleoekologie
    paleogeografie
    paleontologie
    pražská pánev
    Radiolaria
    silur
    taxonomie
    zóny biostratigrafické
Geografické jméno
    ČR-Čechy
Klíčové slovo
    Acid-resistant
    Area
    Barrandian
    Devonian
    Foraminifers
    Microfossils
    Other
    Silurian
Abstrakt (anglicky)
   The first systematic study of the Silurian and Devonian foraminifers from acid-insoluble residues from the Barran-dian area was based on 14 Silurian and 24 Devonian sections including stratotypes and auxiliary stratotypes. Eighty morpho-types of agglutinated foraminifers from families Psammosphaeridae, Hemisphaeramminidae, Saccamminidae, Hippocrepinidae, Ammodiscidae and Lituolidae and 6 morphotypes of calcareous foraminifers were distinguished. Foraminifers are rare in the Silurian (with the exception of the Ludfordian). In the Devonian, foraminifers are common to abundant. They are the most abundant in the Dalejan Třebotov and Pragian Dvorce-Prokop Limestones. The stratigraphical ranges of the Barrandian Silurian and Devonian foraminifers were summarized and the species of biost-ratigraphical value were selected. As the occurrence of foraminifers was influenced by palaeoecological conditions, the stratigraphical ranges represent only ecostratigraphical data for the Barrandian area.
   The highest abundance and diversity of foraminifers in the Třebotov and Dvorce-Prokop Limestones reflect the fact that nodular limestones were deposited under the environmental conditions favoured by the Devonian foraminifers: low-energy, deeper-water environment (below the wave base). The clastic components necessary for building agglutinated tests were present. Foraminifers are a good palaeogeographical indicator. They mainly indicate broad migration of foraminiferal fauna between the Barrandian Dalejan and the Saxothuringian Upper Devonian. Close affinities of foraminiferal assemblages between the Dalejan of the Barrandian, Upper Devonian of the Saxothuringicum and Upper Devonian of the Rhenohercynicum and the Holy Cross Mountains confirm the hypothesis of the closure of the Rheic Ocean in the Late Devonian. Foraminifers migrated to the Rhenohercynicum from the Saxothuringicum in the Late Devonian.
   In the time interval from the Upper Devonian to the Lower Mississippian, the assemblages penetrated to the North American basins through an unknown passageway
Přispěvatel
    Česká geologická služba
Kód přispěvatele
    ČGS (UNM)
Zdrojový formát
    U
Datum vložení
    21. 3. 2008
Datum importu
    8. 8. 2012