Record details

Title
    Further palynomorphs of Early Cambrian age from clastic sediments underlying the Moravian Devonian (borehole Němčičky-3)
Statement of responsibility
    Milada Vavrdová, Jiří Bek
Author
    Bek, Jiří
    Vavrdová, Milada
Language
    anglicky
Source title - serial
    Věstník Českého geologického ústavu (Bulletin of the Czech Geological Survey)
Vol./nr.
    Vol. 76, no. 2
Pages
    p. 113-125
Year
    2001
Notes
    3 obr., 1 tab., 4 pl., 2 s.bibl.
    České resumé
    il.
    Zkr. název ser.: Věst. Čes. geol. Úst. (Bull. Czech geol. Surv.)
Subject group
    Acritarcha
    Algophytae
    biostratigrafie
    kambrium-spodní
    konglomerát bazální
    moravskoslezské prevariské paleozoikum
    nový taxon
    palynomorpha
    taxonomie
Geographical name
    ČR-Morava
    Evropa severní
    Evropa východní
    Měnín (Brno-venkov)
    Němčičky (Brno-venkov)
Keyword
    Age
    Borehole
    Cambrian
    Clastic
    Devonian
    Early
    Further
    Moravian
    Němčičky-3
    Palynomorphs
    Sediments
    Underlying
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
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    4. 7. 2007
Import date
    8. 8. 2012