Oberer Teil des Helvetischen Kieselkalkes (s.l.)

Rappresentazione e statuto

Colore CMYK
N/A
Colore RGB
R: 125 G: 125 B: 125
Rango
unità litostratigrafia
Uso
Unità in uso.
Status
termine scorretto (informale)

Nomenclatura

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

Oberer Kieselkalk (Spörli 1966, Mojon 1982 S.60), Upper Kieselkalk (Föllmi et al. 2007)

Descrizione

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

Età

Geomorfologia
  • Hauteriviano terminale
Età alla base
  • Hauteriviano tardo
Metodo di datazione

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

Paleogeografia e tettonica

Termini generici
Tipo di origine
  • sedimentaria

Referenze

Revisione
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

    Rango
    Strato litostratigrafico
    Statuto
    termine informale
    In breve

    Echinodermenkalk im Dach des Helvetischen Kieselkalkes.

    Age
    Hauteriviano
  • Gebankte Abteilung des Oberen Kieselkalkes

    Rango
    unità litostratigrafia
    Statuto
    termine scorretto (informale)
    In breve
    Monotone Wechselfolge von mittelgebanktem Kieselkalk und dünnen, schieferigen Zwischenlagen im oberen Teil des Helvetischen Kieselkalkes.
    Age
    Hauteriviano tardo
  • Schyniges Band (oberes ...)

    Name Origin
    schynig = scheinig, hell
    Rango
    unità litostratigrafia
    Statuto
    termine obsoleto (abbandonato)
    In breve
    Lokale helle glaukonithaltige Mergelzwischenlage an der Basis des Oberen Kieselkalkes.
    Age
    Hauteriviano
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