«Oberer Öhrli-Kalk»

Back to Aar massif

Representation and status

Index
OÖK
Color CMYK
(32%,0%,15%,33%)
Color RGB
R: 115 G: 170 B: 145
Rank
lithostratigraphic Member (Subformation)
Validity
Unit is in Use
Status
incorrect name (though informally used)

Nomenclature

Deutsch
«Oberer Öhrli-Kalk»
Français
«Calcaire d'Öhrli supérieur»
Italiano
«Calcare dell'Öhrli superiore»
English
«Upper Öhrli Limestone»
Origin of the Name

Öhrli (AI), Alpstein

Historical Variants

Kalk des Unteren Valanginien in Urgonfazies = Oehrlikalk (Furrer 1938), Oberer Örhlikalk (Schindler 1959), upper Oehrli Limestone (Föllmi et al. 2007)

Description

Thickness
Max. 100 m (Föllmi et al. 2007)

Components

Fossil Content
  • sponges
  • corals
  • bryozoans

kleine Biohermen

Age

Age at top
  • Valanginian
Age at base
  • Late Berriasian

Geography

Type area
Alpstein (AI/AR/SG)

Palaenography and tectonic

  • Neocomian
  • Cretaceous of the Helvetics
Paleogeography
North Tethyan Shelf :
marge continentale européenne
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.5: The upper Oehrli Limestone reaches a maximal thickness of approximately 100 m and is comparable in facies to the lower Oehrli Limestone, with as main difference the increased abundance of oolitic grainstone and the presence of small bioherms composed of corals, stromatoporoids and bryozoans.

Back to top