Record details

    Further palynomorphs of Early Cambrian age from clastic sediments underlying the Moravian Devonian (borehole Němčičky-3)
Statement of responsibility
    Milada Vavrdová, Jiří Bek
    Bek, Jiří
    Vavrdová, Milada
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
    Vol. 76, no. 2
    p. 113-125
    3 obr., 1 tab., 4 pl., 2 s.bibl.
    České resumé
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    konglomerát bazální
    moravskoslezské prevariské paleozoikum
    nový taxon
Geographical name
    Evropa severní
    Evropa východní
    Měnín (Brno-venkov)
    Němčičky (Brno-venkov)
Abstract (in english)
   Relatively well preserved, diversified assemblages of acid-resistant plant microfossils were obtained from dark grey siltstones and silty shales from core No.10, Němčičky-3 borehole (depth 5396 m), situated in southern Moravia. Microfossils were studied in palynological residua, thin sections and in scanning electron microscope. The analysed rocks yielded numerous transparent to light yellow palynomorphs (TAI 1 to 1+), frequently filled with minute crystals of pyrite. 26 genera and 55 species of acritarchs and prasinophytes were identified, including age-significant forms. Recovered microfossils (acritarchs, cyanobacterials sheats, fragments of various resistant tissues of uncertain origin and abundant prasinophyte phycomata) indicate marine origin as well as the late Early Cambrian age of fine-grained intercalations in so-called basal clastics, corresponding to the Vergale/Rausve regional stages of the East European Platform.
   Characteristic is the common presence of minute ribbon-like threads, filled with pyrite crystals and entagled in dense clusters. Recovered microfossils reveal close affinities to assemblages of fossil microplankton known from the late Early Cambrian sequences of East European (Latvia, Ukraina) and Baltoscandian platforms (SW Sweden, Bornholm, Baltic depression, Bothnian sea). Coeval fossil populations of marine microplankton have been recently isolated from boreholes Němčičky-6 and Měnín-1. Some aspects of possible secondary provenance of palynomorphs are discussed
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    4. 7. 2007
Import date
    8. 8. 2012