Record details

    Correlation on magnetostratigraphy and calpionellid biostratigraphy of the Jurassic/Cretaceous boundary strata in the Western Carpathians
Statement of responsibility
    Václav Houša, Miroslav Krs, Otakar Man, Petr Pruner, Daniela Venhodová
Other titles
    IGCP Project No 362 Tethyan/Boreal (Cretaceous) Correlation (Variant.)
    Houša, Václav
    Krs, Miroslav, 1928-
    Man, Otakar
    Pruner, Petr
    Venhodová, Daniela
Source title - serial
    Geologica carpathica
    Vol. 50, no. 2
    p. 125-144
    11 obr., 2 fot., 1 tab., 2 s.bibl.
    Zkr. název ser.: Geol. carpath.
Subject group
    flyšové pásmo Západních Karpat
    stratigrafická hranice
    vlastnosti magnetické
    Západní Karpaty
    zóny biostratigrafické
Geographical name
    Štramberk (Nový Jičín)
Abstract (in english)
   A short reverse polarity magnetosubzone, herein defined as the Brnodno Subzone, was detected in the upper part of the magnetozone M19n at the locality of Brodno near Žilina (Western Carpathian) using high-resolution magnetostratigraphy. An analogous short reverse polarity magnetosubzone, herein defined as the Kysuca Subzone occurs in the middle part of the magnetozone M20n. Both the magnetosubzones are known from marine profiles but have been detected only sporadically and documented insuffieciently in continental outcrops. These two subzones have not yet been detected together in one the same continental section. Their stratigraphic position in the Brodno section is defined and their interpretation in the other studied section at Štramberk is inferred.
   In the Brodno section, the Kysuca Subzone represents the basal part of the calpionellid Remainei Subzone of the Crassiocollaria Standard Zone (early late Tithonian), its base lies at the level of 55% of the local thickness of the magnetozone M20n. The Brodno Subzone lies witthin the calpionellid Alpina Subzone of the Calpionella Standard Zone (earliest Berriasian) and its base in the brodno section lies at the level of 80% of the local thickness of the magnetozone M19n. In both the studied sections, the Jurassic/Cretaceous boundary based on calpionellids (base of the Calpionella Standard Zone) lies approximately at the end of the lowermost third of the magnetozone M19n (at the level of 34% of the local thickness of the magnetozone M19n in the Brodno section). Magnetostratigraphic calibration of calpionellid events proved their isochronous character in the localities of Brodno and Štramberk. The interval of ca.
    5000 years, during which a transition occurred from normal (reverse) to reverse (normal) polarity of magnetic field of the co-axial geocentric dipole of the Earth, can be determined from an analysis of paleomagnetic directions inferred from samples with intermediate polarity collected from normally and reversely polarized boundary strata
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
Entered date
    25. 3. 2008
Import date
    8. 8. 2012