Record details

    Devonian ammonoid zones and their correlation with established series and stage boundaries
Statement of responsibility
    R. Thomas Becker, Michael R. House
Other titles
    Subcommission on Devonian Stratigraphy - Fossil groups important for boundary definition (Variant.)
    Becker, R. Thomas
    House, Michael R.
Source title - serial
    Courier Forschungsinstitut Senckenberg
    Roč. 220
    s. 113-151
    3 obr., 4 tab., 12 s. bibl.
    Zkr. název ser.: Cour. Forsch.-Inst. Senckenberg
Subject group
    korelace stratigrafická
    pražská pánev
    stratigrafická hranice
    zóny biostratigrafické
Geographical name
    Afrika severní
    Amerika severní
Abstract (in english)
   In the last fifteen years major progress has been achieved in refining and improving considerably the old German-based Devonian ammonoid zonation. detailed bed-by-bed collecting in various basins on different continents has shown that an international zonation can be established which is at least as detailed as the conodont scale. Occasionally regional successions may give an even higher time-resolution. The currently established regional and international zones are reviewed and their correlation is given with the series and stage boundary levels now defined by the IUGS. The base of the Emsian proceded the entry of the oldest goniatites. The base of the Middle Devonian is ill-defined in goniatite stratigraphy and may only be recognised by the final extinction of Gyroceratites. The base of the Givetian lies just above the earliest occurrence of Maenioceras (in the basal Maenio, undulatum Zone) in the Jebel Mech Irdane GSSP.
   The Middle-Upper Devonian series boundary again is poorly defined in ammonoid terms and precedes the terminal extinction phase of last Pharcicerataceae (Petteroceras and Neopharciceras). The Frasnian-Famennian boundary coincides precisely with the major global extinction at the end of the Crickites holzapfeli Zone which wiped out all late Frasnian gephuroceratids, beloceratids and many tornoceratids. The base of the Carboniferous postdates the major Hangenberg Extinction Event and falls within the Acutimitoceras prorsum Zone. In a taxonomic appendix, Delphiceras nom. nov. (Gephuroceratidae) and the Holzapfeloceratidae n.fam. are introduced
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    14. 8. 2007
Import date
    8. 8. 2012