Record details

Title
    Biostratigraphy and Facies of Upper Jurassic-Lower Cretaceous pelagic carbonate sediments (Oberalm-, Schrambach- and Rossfeld-Formation) in the Northern Calcareous Alps, South of Salzburg
Statement of responsibility
    Daniela Boorová, Harald Lobitzer, Petr Skupien, Zdeněk Vašíček
Other titles
    Geologie ohne Grenzen - Festschrift 150 Jahre Geologische Bundesanstalt (Variant.)
Author
    Boorová, Daniela
    Lobitzer, Harald
    Skupien, Petr
    Vašíček, Zdeněk
Language
    anglicky
Source title - serial
    Abhandlungen der Geologischen Bundesanstalt
Vol./nr.
    Vol. 56, no. 2
Pages
    p. 273-318
Year
    1999
Notes
    4 obr., 3 fot., 3 tab., 14 pl.
    il.
    Německé resumé
    Obsahuje bibliografické odkazy
    Zkr. název ser.: Abh. Geol. Bundesanst. (Wien)
Subject group
    Ammonoidea
    aptychy
    Calpionellidae
    Dinoflagellata
    flyš divoký
    jura
    křída-spodní
    popis taxonů
    sedimentace pelagická
    sedimenty karbonátové
    tithon
    zóny biostratigrafické
Geographical name
    Rakousko-Salzburg
Keyword
    Alps
    Biostratigraphy
    Calcareous
    Carbonate
    Cretaceous
    Facies
    Jurassic-Lower
    Northern
    Oberalm-
    Pelagic
    Rossfeld-Formation
    Salzburg
    Schrambach-
    Sediments
    South
    Upper
Abstract (in english)
   An interdisciplinary study of some key sections of Late Jurassic-Early Cretaceous pelagic carbonate sediments (Oberalm-, Schrambach- and Rossfeld-Formation) south of Salzburg was carried out with particular focus on biostratigraphy and microfacies. Calpionellids prooved to be most useful for the Late Jurassic-Berriasian sediments, while dinoflagellate cysts take over this role in sediments of Late Berriasian-Valanginian age, supplemented by occasional findings of aptychi. The most remarkable result of our study is, that the "typical" lithofacies-types of the above mentioned pelagic limestones show considerable different stratigraphic age. "Typical" limestones of Oberalm-type show for instance a Late Tithonian age in the Gutrathsberg and Mathias Waalinger Quarries, while in the Woerndl Quarry they comprise the early- (?middle) Berriasian.
   In the Rettenbacher Quarry pelagic limestones of Oberhalm-type are intercalated by allodapic Barmstein-Limestone beds, comprising a stratigraphic interval from the latest Tithonian to the latest Berriasian, maybe even to the early Valanginian. On the contrary the sedimentation of thin-bedded Schrambach-type limestones commenced in the Gutrathsberg Quarry already in the Late Tithonian and persisted till the Late Berriasian. In the Gutrathsberg Quarry variegated coloured marlstones ("Anzenbach-Member") are considered to mark the boundary between the Schrambach- and the Lower Rossfeld-Formation, the latter of Early Valanginian age - as prooved by the study of dinocysts and aptychi - while the marls accompanying the "wildflysch" olistolithic breccia of the Upper Rossfeld-Formation can be dated by dinoflagellate cysts as Late Valanginian.
   Another type of "wildflysch" breccias of the Upper Rossfeld-Formation is represented by an extremly poorly sorted clast-supprted breccia without any marly matrix. However, in between the olistolithic clast supported grainflows, also marly pockets can be observed, which yielded dinoflagellate cysts of ? Hauterivian age
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    31. 3. 2008
Import date
    8. 8. 2012