Record details

Title
    Ichnological aspect of fossiliferous nodules of the Šárka Formation (Ordovician, Llanvirnian, Czech Republic)
Statement of responsibility
    Radek Mikuláš
Author
    Mikuláš, Radek
Language
    anglicky
Source title - serial
    Bulletin of geosciences
Vol./nr.
    Vol. 78, no. 1
Pages
    p. 83-88
Year
    2003
Notes
    2 obr., 1 fot., 1 tab., 2 pl., 26 bibl.
    il.
    Zkr. název ser.: Bull. Geosci.
Subject group
    Barrandien
    biocenóza
    diageneze
    ichnofosilie
    llanvirn
    nodule
    ordovik
    pražská pánev
    prostředí anoxické
    taxonomie
    trace fossils
Geographical name
    ČR-Čechy
    Volduchy (Rokycany)
Keyword
    Aspect
    Czech
    Formation
    Fossiliferous
    Ichnological
    Llanvirnian
    Nodules
    Ordovician
    Republic
    Šárka
Abstract (in english)
   In the muddy, oxygen-deficient sediments of the Llanvirnian of the Prague Basin, chemical disequilibrium between burrows and the host substrate were a common reason for the origin of nodules. As the ichnofossils are well preserved in the nodules, without deformation, the origin of the nodules during very early diagenesis is likely, in some cases possibly contemporaneous with the existence of the open burrow. The steepest chemical gradient can be expected close to the openings of the burrows. Therefore, these parts of burrows may have had the highest fossilization potential. The ichnogenera of Skolithos, Planolites, Rhizocorallium and Glockerichnus were recognized as possible agents of the nodule-forming process
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    27. 9. 2007
Import date
    8. 8. 2012