Oberer Teil des Helvetischen Kieselkalkes (s.l.)

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Representation and status

Color CMYK
N/A
Color RGB
R: 125 G: 125 B: 125
Rank
lithostratigraphic unit
Validity
Unit is in Use
Status
incorrect name (though informally used)

Nomenclature

Deutsch
Oberer Teil des Helvetischen Kieselkalkes (s.l.)
Français
Partie supérieure du Kieselkalk Helvétique
English
Upper part of the Helvetic Kieselkalk
Historical Variants

Oberer Kieselkalk (Mojon 1982 S.60), Upper Kieselkalk (Föllmi et al. 2007)

Description

Thickness
Max. ca. 50 m (Föllmi et al. 2007)

Age

Age at top
  • Latest Hauterivian
Age at base
  • Late Hauterivian
Dating Method

Ammoniten-Biostratigraphie der umrahmenden Einheiten (Föllmi et al. 2007)

Palaenography and tectonic

Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary

References

Definition
Föllmi Karl B., Bodin Stephane, Godet Alexis, Linder Pascal, van de Schootbrugge B. (2007) : Unlocking paleo- environmental information from Early Cretaceous shelf sediments in the Helvetic Alps: stratigraphy is the key! Swiss J. Geosci. 100, 349-369

p.9: The upper Kieselkalk is less thick than its lower counterpart and reaches maximally approximately 50 m (Fig. 2; Funk 1969, 1971; Funk et al. 1993). It is very similar to the lower Kieselkalk with regards to its facies and consists in proximal areas of a coarse grained sandy and siliceous, heterozoan carbonate, which becomes finer grained and more pelagic in the outer shelf area. It displays a well-expressed shallowing upward trend in distal platform areas grading from a fine-grained, marly carbonate at its base into a very coarse crinoidal limestone at its top (“Echinodermen-Breccie” of Kaufmann 1867; see also Funk 1971). The general progradation of shallow-water carbonates shown by the shallowing-upward trend classifies the platform-related part of the upper Kieselkalk as a highstand systems tract.
Its age is well defined by the ammonite biostratigraphy of the underlying Lidernen Member and overlying Altmann Member and is limited to the younger part of the ligatus zone and the older part of the following balearis zone.

  • Chriesiloch-Echinodermenkalk

    Rank
    lithostratigraphic Bed
    Status
    informal term
    In short

    Echinodermenkalk im Dach des Helvetischen Kieselkalkes.

    Age
    Hauterivian
  • Gebankte Abteilung des Oberen Kieselkalkes

    Rank
    lithostratigraphic unit
    Status
    incorrect name (though informally used)
    In short
    Monotone Wechselfolge von mittelgebanktem Kieselkalk und dünnen, schieferigen Zwischenlagen im oberen Teil des Helvetischen Kieselkalkes.
    Age
    Late Hauterivian
  • Schyniges Band (oberes ...)

    Name Origin
    schynig = scheinig, hell
    Rank
    lithostratigraphic unit
    Status
    obsolete term (disused)
    In short
    Lokale helle glaukonithaltige Mergelzwischenlage an der Basis des Oberen Kieselkalkes.
    Age
    Hauterivian
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