Calcaires Inférieurs

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Representation and status

Index
lCi, Lc
Color CMYK
24/36/0/0
Color RGB
R: 185 G: 160 B: 205
Rank
lithostratigraphic Member (Subformation)
Validity
Unit is in Use
Status
informal term

Nomenclature

Deutsch
Untere Kalke
Français
Calcaires Inférieurs
Italiano
Calcare Inferiore
English
Lower Limestones
Historical Variants
Calcaires inférieurs (Jaccard 1904, Plancherel 1998), Untere Kalke (Arbenz 1947)

Description

Description
Calcaires siliceux bruns à silex noirs avec interbancs schisteux.
Thickness
35-40 m (Rutsch et al. 1966), 50 m (Badoux 1960).

Components

Fossil Content
  • echinoderms
  • crinoids
  • belemnites
Pentacrinus tuberculatus Miller (Jaccard 1904)

Hierarchy and sequence

Age

Age at top
  • Sinemurian
Age at base
  • Sinemurian
Dating Method

Pentacrinus tuberculatus Miller [Arbenz 1947], "Lias inférieur"

Geography

Geographical extent
Pas de Morgins (Chessex 1959), vallon de Charmy (Morel 1971, Rham 1962).
Type area
Hornfluhgebiet (BE)

Palaenography and tectonic

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

References

Definition
Jaccard Frédéric (1904) : La région de la Brèche de la Hornfluh (Préalpes bernoises). Bull. Lab. Géol. etc. (Univ. Lausanne) 5, 205 pages
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