Record details

    Lower Devonian conodonts from the Karlík Valley and Na Branžovech sections in the Barrandian area, Czech Republic, and their significance for Pragian conodont zonation
Statement of responsibility
    Ladislav Slavík
    Slavík, Ladislav
Source title - serial
    Acta geologica polonica
    Vol. 51, no. 3
    p. 253-271
    5 obr., 2 pl., 5 s.bibl.
    Zkr. název ser.: Acta geol. pol.
Subject group
    popis taxonů
    pražská pánev
    sedimenty karbonátové
    stratigrafická hranice
    zóny biostratigrafické
Geographical name
    Karlík (Praha-západ)
    Koněprusy (Beroun)
    Loděnice (Beroun)
Abstract (in english)
   Two early Devonian sections used for this study display a markedly different facies development and lie on opposite limbs of the central Barrandien synform, in the stratotype area of the Pragian stage. the present biostratigraphical information based on 18 species with a total of 350 conodont specimens is mostly related to the late Lochkovian and early Pragian, whilst the remaining parts of the Pragian involve mostly long-range conodont species. the late Lochkovian conodont correspond to two zones eurekaensis and delta. The latest Lochkovian zone pesavis was found in the northwestern limb, but not on the opposite side. the absence of pesavis Zone in the south (Koněprusy) and, as it has been newly shown, in the south-east of the central Barrandian synform (Karlík Valley) suggests that a prominent lowstand sedimentary starvation affected much larger areas than only the tops of elevated ridges.
   The lower two thirds of the Pragian sequences can be zoned using two newly suggested conodont zones steinachensis and serratus, respectively, that are defined by the first and last occurrences of these taxa. The occurrence of Latericriodus steinachensis (Al-Rawi) eta morph. marks the lower third and the entry of Pelekysgnathus serratus serratus JENTZSCH corresponds to the base of the middle third of the Pragian. The newly suggested stratigraphical applicability of these two species can effectively substitute the pre-existing sulcatus and kindlei subdivisions that have no zonal species representation in the stratotype area
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    18. 8. 2008
Import date
    8. 8. 2012