Podrobnosti záznamu

    A new vent-related foraminifer from the lower Toarcian black claystone of the Tatra Mountains, Poland
    Bubík, Miroslav
    Jach, Renata
    Tyszka, Jarosław
Typ dokumentu
    článek v periodiku
Zdrojový dokument - seriál
    Acta Palaeontologica Polonica
    Roč. 55, č. 2
Výraz tezauru
    Foraminifera, Ammosphaeroidinidae, agglutinated foraminifera, hydrothermal vent, black claystone, suboxia, The Carpathians, Tethys, Jurassic
Klíčové slovo
Abstrakt (anglicky)
   Recurvoides infernus sp. nov., one of the oldest representatives of the superfamily Recurvoidacea (Foraminiferida), is described in a thin black claystone overlaying the manganese deposits of the Krížna Unit in the Tatra Mountains (Poland). These manganese carbonates/silicates were laid down around a shallow exhalative submarine vent, active in the Early Toarcian. The microfossils are possibly the first described Jurassic foraminifera associated with hydrothermal vents. The assemblage is dominated by a high abundance and dominance of this new species. The primary lamination of the claystone, the lack of any macrofauna, and an elevated TOC content point to oxygen-deficient conditions during sedimentation of these deposits. The nearly exclusive occurrence of agglutinated foraminifers suggests a low pH level. It is likely that foraminifers colonized vent-related bacterial mats that acted as a rich and stable food source. Modern shallow- and deep-water hydrothermal vents may represent simi
   lar habitats.
    Česká geologická služba
Kód přispěvatele
    ČGS (RIV)
Zdrojový formát
Datum importu
    15. 10. 2014